The problem with this fight is that you simply need too many decent AoE, in addition to a really fucking strong single target. Maybe Arash, Gilgamesh (NP2 probably), Waver, and Spartacus.
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Otherwise, must use Plugsuit and possibly add Lu Bu with a LB Kaleidoscope or something equally dumb.
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It'd be one thing if there was only one enemy in the second wave, but nope.