Notes
I will explain the cards but if you wish for more in-depth information, go to https://www.carddass.com/dbh/sdbh_ugm/cardlist/ with a translate add on or utility, can copy the card text and paste it to google translate if you're an unsophisticated ningen. And Dimpsu, if you are reading this, pls WM2, I need the localized goodies so I don't have to cry on not letting my deck building autism flow, and you know that you can make it a masterpiece, H1 -> UGM5. Also for possible card choices, this won't be 100% complete, hundreds to thousands of combos, just the initial ones that came to my mind that I thought were noteworthy. Also i won't touch apps too much if at all for these deck techs because they're not in my wheel-house, best I can say is use what feels right, PWR LV Limiter on R2/3, maybe Ultra God App if you wounded Vegito (Xeno), there's a missile app for R4/5 that deals 20k damage that you could try to stall towards, won a finals match on stream.
Faces
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BM5-062 Demigra
When an attacker, gain 1k PWR (permanently) per enemy attacker and 1k PWR LV (this round only, generates HE), when attacking, reduce enemy HE by own PWR, up to three HE. God Meteor disables increases to PWR LV on enemy supporters and his unit is 2x PWR for unit members. The PWR and PWR LV is nice, even if not amazing compared to what UGM5-SEC Piccolo (SH) can give out or just the massive fixed damage of UGM4-SEC2 Gotenks, but he can certainly still do some work since he kind of mixes both with HE destruction. As for the God Meteor, it sucks, putting PWR LV to really low or normal isn't bad, but as a god meteor that targets supporters, that's pretty bad, supporters are rare nowadays and the cards this wants to hit are nowhere near the support area.
BMPS-17 Gogeta (UM)
Now to the god meteor worth using, Hellfire God Meteor, remember this as you can only use one god meteor per game, it's not like Double Attacks for example which you can use as many as you have, once a round. Intimidating Aura, which makes the enemy unable to increase HE by abilities can be really nice, and the cherry on top is the PWR LV Limiter, for 4 HE and Vegeta (Xeno) and Goku (Xeno) as unit members, he can limit the enemy to only having 2k PWR LV, a debilitating effect that allows you with ease to race ahead while they're stuck with little in the way of HE or PWR LV.
Xenoverse Options
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BM6-054 Goku (Xeno) OR PUMS5-12 Goku (Xeno) OR PBBS11-04 Goku (Xeno)
By abusing PWR LV Limiters, enemy won't have much HE so your team will do increased damage with BM6-054 Goku (Xeno), there is a meme idea where you use the fusion to fulfill the requirement for Robel's need for Vegito (Xeno) but timing can be a bit rough, in that fusion activates before using a limit which means you may feel forced to use the PWR LV limiter unit for Gogeta (UM) before fusing, and the reward for fusing here is merely alright. PUMS5-12 Goku (Xeno) has Realm of the Strong with a Spirit Bomb CAA that deals 2x damage, nice stun effect to hold out on PWR LV Limiter units or to tell BM7-SEC Goku to go away. PBBS11-04 Goku (Xeno) comes with Solid Tactics that can allow for a more aggressive HA with STA generation, compared to BM4-CP2 this card has a better CAA with extra damage, welcomes the simple PWR Explosion Unit on Demigra since it's not as committal as using a PWR LV Limiter.
BM11-057 Goku (Xeno)
Comes with a keysword lock, PWR LV Limiter, and if a supporter, seals the super attack of the enemy if they have more HE than required for the super attack. This is if you're going with the BMP-15 Trunks (Xeno) and BM11-SEC2 Goku line, and wanted to partially recreate the peak Goku meta of BM12. This is a great common but has fallen from grace due to Aeos kind of putting the breaks on BM11-SEC2 Goku, not recommend without the support.
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PCS16-10 Vegeta (Xeno) OR PCS17-01 Vegeta (Xeno) OR SH2-051 Vegeta (Xeno) OR BMPS-20 Vegeta (Xeno) OR BM6-056 Vegeta (Xeno)
PCS16-10 is wall burst alongside extra DMG reduction when a supporter, nice to give the deck traditional defense against hard hitters. PCS17-01 is Battle Pride (2k PWR for ally attackers for each HE you have over the enemy), which seems easy to proc if the enemy is locked to only having 2k PWR LV, which doesn't even guarantee 1 HE by PWR LV but he doesn't bring much besides that, and it can get rough if the enemy is a bit more on STA damage. SH2-051 is fixed damage with a unit that can give some extra PWR if adding on BM11-SEC2 Goku and Trunks (Xeno) in the form of a unit, which can proc PBBS11-04 Goku. BMPS-20 is Keysword Lock + Defensive Stance, nice attributes for a defensive card if you're using a more offense Goku (Xeno), just in a different way than in PCS16-10. BM6-056 Vegeta (Xeno) can be used if Goku (Xeno) is going more utility/STA generation as he reduces enemy DMG reduction if you have more HE than the enemy, requires testing like BM6-054 Goku (Xeno) to see if it is reliable, and the fusion is probably just as much a meme, an extra meme is that for the fusion, on either card, you need SS4LB Goku (Xeno)/Vegeta (Xeno).
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UGM4-049 Vegeta (Xeno) OR BM9-062 Vegeta (Xeno) OR UGM3-047 Vegeta (Xeno)
UGM4-049 is Resurrection Unit + Defensive Stance, BM9-062 is a unit that fully restores STA of unit members and gives them 10k PWR alongside a freeze attack. UGM3-047 Vegeta (Xeno) brings a keysword lock, Opportunity to Obstruct, and a unit that sets all enemies with 14k+ PWR to 1 permanently. These are options to also look into if you're going towards the BMP-15 Trunks (Xeno) and BM11-SEC2 Goku package, otherwise you can ignore them.
Other Cards of Note
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BM5-063 Robel AND UGM3-068 Vegito (Xeno) OR UM10-SEC4 Vegito (Xeno) OR BM5-SEC Vegito (Xeno) OR BM11-BCP6 Vegito (Xeno) OR BM8-CP2 Vegito (Xeno) OR PUMS9-01 Vegito (Xeno)
When a supporter, Robel offers 4k fixed damage when linked to Demigra alongside a powerful PWR LV Limiter Unit that requires Vegito (Xeno) as a unit member, a generous unit member with the various strong cards that are linked to him. UGM3-068 offers big damage, nice PWR LV, and a good stun effect that can help stack on Demigra and BM6-054 Goku (Xeno)/BM6-056 Vegeta (Xeno), preventing the enemy from staging any form of HE. UM10-SEC4 Vegito (Xeno) is focused on fixed damage, 5k if hitting an enemy that can't be stunned, 2k otherwise, this can stack with SH2-051 Vegeta (Xeno) for 9k-12k fixed damage in a round, he also steals 3k PWR which is neat. BM5-SEC Vegito (Xeno) can cut an enemy's PWR down to 2k and will target the enemy with the highest PWR, and with a high base PWR of 9k, he might be targeted for the Aeos/ABS-03 Vegitos of the world, meaning it's often he'll set someone's PWR to 2k, he also has Energy Charge as a unit effect with Robel and Demigra which could be nice if under a PWR LV limiter and you still want some HE. BM11-BCP6 Vegito (Xeno) OR BM8-CP2 Vegito (Xeno) is 99% preference, both have Battle Pride, could stack with PCS17-01 Vegeta (Xeno) if you feel really comfortable on having more HE than the enemy, just be wary as little defense, theoretically BM11-BCP6 is better since he comes with 10% STA generation but the CAAs are identical in use, do you want SS4 Vegito (Xeno) or SS4LB Vegito (Xeno). PUMS9-01 Vegito (Xeno) transforms in R2 to ignore enemy GRD in SS4LB, he also natively ignores DMG multiplication, like Hellfire God Meteor, gains PWR/GRD based on enemy attackers (2k each), which means he can hit hard even if in non-optimal circumstances, note that PWR LV Limiter aren't too conducive since they reduce how fast the enemy can be.
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BMP-15 Trunks (Xeno) OR HJ6-63 Trunks (Xeno) OR UGM1-053 Trunks (Xeno) AND BM11-SEC2 Goku
So BMP-15 Trunks is simple, he's a good synergy piece for decks that want to use units, giving 5k PWR every turn as well as energy guard, he also opens up a Goku (Xeno) that works really well with BM11-SEC2 Goku, fusion of Ki goku. The Goku here gains 3x PWR LV at the start of the round as well as restoring a bar of STA for all allies that share his type, HR, of which Demigra, the Goku (Xeno) he pairs with (alongside a few others), possibly Vegeta (Xeno), Trunks (Xeno), and maybe even your HA depending on what you choose. And in case you wanted more GRD shredding, you can use HJ6-63 Trunks (Xeno), since with PWR LV Limiters and BM11-SEC2, you'll be often winning the PLBP, UGM1-053 Trunks (Xeno) is more versatile, doing some STA damage and PWR disruption but not as strong at GRD shredding. As for BM11-SEC2 Goku, he is very fast, but also doesn't appreciate the existence of UGM1-SEC Aeos, her keysword can disable his damage if not her unit, and acts as just a strong defensive core that can punish the fast decks that Goku used to pilot.
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UGM2-065 Piccolo (SH) and UGM2-064 Gohan (SH)
Good core, the STA and utility of Gohan and Piccolo (SH) are useful now as ever, also comes with the extra utility of the CI interference since we do use units, and allows a more aggressive HA to take pilot. They're good consistent cards that you can't feel wrong using.
The Deck Proper
HA
As is in many decks, it's a bit of a versatile pick, depending on the make up your deck ends up, much easier to recommend SS4LB HA if you're going into the BM11-SEC2 route since Note's a HR and can give everyone a nice floor of PWR, but you can also go EL Android HA or BS Fem Saiyan, deck is good enough to guarantee you win the PLBP. If I were to play it, I'd probably force SS4LB Note because this world needs more animated monkeys rather than boring gods.
PBBS11-04 Goku (Xeno)
So this is the one with actual utility, could have gone to PUMS5-12 if you're deathly afraid of BM7-SEC Goku but from what I've seen, he's falling a bit, and if UGM5-SEC2 Aeos sees play, he'll fall a bit harder since she's such a good tech against him.
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SH2-051 Vegeta (Xeno) OR PCS16-10 Vegeta (Xeno)
So I do think there is merit on just going ham on fixed damage, even if some of it is random, but in case you are looking for more reasonable choices, I'd put PCS16-10 Vegeta (Xeno) in this card's spot instead. Vegeta (Xeno)'s 3k, Robel's 4k, and then Vegito (Xeno)'s 2k-5k, is just a lot of fixed damage and if you're really afraid of Jiren having more PWR than you, you can always replace BMPS-17 Gogeta (UM) for UM3-036, for what you gain in PWR, you lose out in a PWR LV Limiter unit. As for PCS16-10, he helps survive round 1 aggression, Hellfire God Meteor's great, for R2 onward, the round after you fire it, meanwhile in the immediate, PCS16-10 is sort of defensive stance (40% when a supporter instead of 50% when an attacker) alongside a block burst (take your poison of UGM5-ASEC Kid Goku, UGM4-SEC2 Gotenks, BM12-SEC Goku, UGM3-SEC2 Jiren, and BM11-SEC3 Goku).
BM5-063 Robel
This brings nice fixed damage when linked to Demigra as well as extra STA generation, for him alone, all topped off with a strong PWR LV Limiter unit that sets the opponent to 3k PWR LV and also making supporters not gain STA, doesn't stop other forms of STA generation but it is still very nice, 4 HE and FREE.
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UM10-SEC4 Vegito (Xeno) OR UGM3-068 Vegito (Xeno)
UM10-SEC4 is nice for fixed damage, the lock-on is cute, increasing enemy CI speed as well as coming with a burst, the 3k PWR steal is also neat, but the reason here is for the possible 5k fixed damage, note that targeting can be a bit random but depending on what the enemy team does, it may not be as rare. UGM1-SEC2 Goku can't be stunned, there's an app that makes it where the team can't take any form of STA damage, works just as well for this card, UGM1 Aeos and UGM3 Vegito (Xeno) both also can't be stunned, rarely to be a full team but usually at least someone. UGM3-068 Vegito (Xeno) just makes sure the enemy can't race your HE generation as well as give the deck a nice speedy beat-stick, 4k PWR LV alongside 4x DMG is pretty good.
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BM5-062 Demigra
BMPS-17 Gogeta (UM)
Face spiel, the reason the deck came to be. This world needs more revitalizing reds instead of boring blues. Beast Gohan (SH) does get respect.