I don't know if someone has suggested this yet, but if you're basing Jill on MvC2 her unique tactic should be switching between the different grenade ammo available in Nemesis: Flame, Ice, and Acid. Maybe Flame makes a fire on the ground if it misses and Acid poisons, I dunno.
Oh, why must I tell 'em again?
What must I tell 'em, my friend?
That we are born into sin
And we are worshiping murderers
Nothing but evil duplicitous men
I know you heard of 'em all
We should just murder 'em all
We should just murder and ball
We dance on the ruins we looting from all of they palace's walls