Acolyte or Kenobi, Asajj or Daka?

So I've been running Nightsisters (zzTalzin lead, Asajj, Daka, Acolyte, and Zombie) in arena for a while now. Recently, in a lot of the game changers' videos, they use General Kenobi in place of Acolyte. I have both a 6 stars gear 11 with 5 dot mods, but I'm not really sure who is better. Also, I recently got 20 zeta mats, and I was wondering who's unique is better, Asajj or Daka.