Talk:Easter2017:Dungeon/@comment-1036329-20170425014755

Cotton only adds Light and Dark to his natural Water element attack. He boosts all elemental damage though.

Farmed the spheres on the lower levels due to lack of maxed thunder units, but managed a clear of the last stage with lv. 150 Stein, Quaid and Zelnite (lead) with the other three dead.

Notes:

15k HP on the status screen + a 50% HP lead is about enough for a Thunder/Earth/Water unit to consistently (barely) survive his nukes even buffwiped. Light/Dark/Fire will need more because Cotton deals boosted damage to those elements. You'll need to watch out for Hailstone Shot and recover BB for your mitigator if they get drained. Cotton buffwipes, often, but he doesn't always do so on his first action so mitigation is still relevant. You will also probably want some form of healing because Cotton's buffwipe + nukes hurt, a lot.

If you are not using a defensive lead, Carrol will die. Don't waste your revives on her or anyone else who can't consistently stay alive. Also bring Fujins in case your burst BB recovery unit gets drained alongside your mitigator by Hailstone Shot.

If you can't kill Cotton immediately, you might want to bring a couple of glass cannons for nuking on turns 1-2 and whenever the overdrive gauge gets recharged, alongside three other units who can turtle through the rest.