I have Padme and have used her a lot in tw and ga. All the zetas you have are good. Despite what people say with Ashoka her assists can be useful.
As for Kenobi or Anikan, i believe both can be good. my latest zeta was on anakin, it helped me save padme and win a match. If the enemy AI targets padme and gets her to half health. Anakin takes a turn, then padme takes a turn. Where she can heal with her special or heal with her 55% health steal. That can be very useful.
the guaranteed taunt on Kenobi looks great and could help absorb damage. that's my plan on my net zeta