Hell's Vengeance party question. (Spoilers to a minimum please)

[28Gnomes&A_Donkey]

Yo! Me and some folks will be playing Hell's Vengeance soon and I am looking for some suggestions for what I should play. I like every class in Pathfinder so I was really just hoping to get an outsiders perspective on what would fill out our team.

Right now we have a devil binder wizard, an arcanist and finally some sort of martial class (anti paladin, bloodrager, cavalier, etc)

So what do you people think would help balance out our team?

[Tammerine "Tammy" Dragontoe]

Tammy's a psychic, but there's no wrong way to go.

Subterfuge is always fun. Slayer, alchemist, and Swashbuckler are all possibilities for awesomeness.

[Gerald]

Healing is important. I'd play a class that could help with that.

[Cole Deschain]

Evil bard. Make friends. Influence people. Poison their drinks.

[baja1000]

I'm about to play as well. Food for thought, I'm going a Warpriest of Lamashtu, though I had also considered Pazuzu and Deskari. If you want something like I'm doing, look into Demoniac and work with something with one of the many awesome look demon lords in the Lord's of Chaos book. Flauros could be fun too to worship xD