Spy is great in the Padme event.
B2 is great in Padme
Grievous is very good, bordering on great
Jango is very good, bordering on great
Nute is at least good
Droideka (no zeta) is good
Ventress is good
Droideka (with zeta) is average
Poggle is average
Soldier is average (avoid calling an assist with its special)
Dooku isn't good but doesn't hurt you too much. Dooku is best with a lot of speed and going first. Use stealth as much as possible - you really don't want to counterattack.