ABadSeed

For what it's worth, for last stage I go in with a huge healer, minion summoner, wither downer, atk stacker and sniper - bonus if any of them can cause DOT (damage over time) as that can chip away at chest health even when in closed state. My exact team is (all lv. 90 w/ 25 emblems) Cleopatra (use base, but has costume boost) Whitefang (sniper, plus spreadable DOT that lasts continuously) Ceris (for silence and wither atk and def) Daroga (for atk stack, and also bleed) Hulda (my GOAT, for beefy minions that also heal over time. i use the base, w/ costume bonus too) Cleo w/ costume is handy too if you time when to fire her special -- 100% chance to cleanse latest status damage effect from a chest, which is useful in the non-boss rounds. Items, /i actually don't use any revive scrolls (probs should) but I do go in with tornados, hurricanes, super mana pot and timestop. Always reserve the super mana pot for Cleo or Hulda, handy in a pinch. I know minions are useless in boss stage, but hey, I'll take the health recovery lol.