Atton: I equip Atton with duel blasters and have him be a long-range Jedi/Sith sniper...
Visas: I mainly concentrate on force powers, with flurry as the combat back-up. I also find it fun to have an all hand-to-hand team with myself, Ms. Handmaiden, and Ms. Marr...
Bao-Dur: IMHO Bao is alloying a hell, so I never use him. However, he is a good swordsman if you're willing to stomach his dialog...
Handmaiden: This sexy girl is the queen of close combat, so concentrate on her hand-to-hand skills by sparing while she is in lingerie... (w00t)
GOTO: I never use Mr. GT, so I wouldn't know the best weapons to use with this droid... "
HK-47: I use duel blasters or a blaster rifle with HK, as he needs nothing else...
T3: As I think T's a hunk of scrap medal that only has one redeeming aspect: his unlimited shock arm attachment. If you must use him get the duel wield feats and equip this bundle of rust with two good blasters...
Exile: This is up to you, although I prefer a hand-to-hand trained force user...
Kreia: I give her a blaster when I'm forced to use her...
Mira: She is the other Jedi/Sith sniper, although I usually give Mira a rifle over handguns...
Mandalore: He is a tank and can use a double-bladed sword or two blasters...