Raid TL;DR

Kaiten has two phases - Phase 1, with 5 Kaitengers, and Phase 2, with 1 Kaiten Mecha.

• Phase 1
  • Each Kaitenger has a different skill, but your main concern will be that Red taunts for 10s every 20s
  • You can disrupt the Kaitengers with a CC (most commonly Tsubaki's EX), and (TOR EXCLUSIVE) they will receive +40% damage taken debuffs for 15s whenever CCed.
  • Keep in mind that Kaitenger Red has 4x the DEF (1332 vs 333) of others.
• Phase 2
  • Kaiten will switch between 3 auras every 20s. Pink hurts, Red stuns, and Green nerfs heals.
  • Every minute, Kaiten will pull out a sword and blast ALL of your students with an unavoidable, shield-ignoring 64k damage slash.
  • Doing (EXT 2.5m, INS 3.5m, TOR 11m) hp damage to an aura will cause a part break, removing use of the aura and stunning Kaiten for 10s.
  • When Kaiten puts up its shield, it receives a 50% damage reduction buff. This can be removed by using EX skills for (INS 10, TOR 15) hits.