Eh, I'm thinking the mutant ladies take this. Voodoo is nearly dead weight here. In melee, Mystique or Domino would beat the shit out of her. At range, they'd shoot her before she could really do much. Voodoo would have to get off her "resurrect an undead army" spell to really help Grifter out, and I don't see it happening before she gets taken out.
Which leaves Grifter flying solo.