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.
Good day from the house of the haunted
Get a job, get a house, get a coffin
Don't stray from the path, remain where you at
That maximizes our profit
Is that blunt? Oh well, hell, so's this boot
We live to hear you say "please don't shoot"
A pure delight, c'mon, make my night
When I file reports what's right's what I write