Next Zeta Suggestions / Help please

Empiric1

Stuck on what to do for my next zeta - they are hard to come by.

I have zzVentress and Talzin unique at the moment

For my next zeta I'm debating between these:

CLS IBAT - so I can do 33M dmg in HAAT with Acktress team although I might be able to save up another zeta before BB8 comes

Mother Talzin leadership - for Arena and TW although I already have Ventress

Wampa - for Arena when I unlock him (1 or 2 TBs away)

Zolo - although my Han is only 6* and level 1 but I heard this zeta is very useful

Sion - for Arena in the future but he's only 4*

Veers - Could gear up my troopers for TB but DT is only 2*


My roster: https://swgoh.gg/u/adapting/

Leaning towards CLS IBAT or Wampa, if I zeta MT then probably not worth changing arena team, also I already get top 10 scores in HAAT, usually between 4-7 so not sure if it's worth using a zeta on CLS and still don't have BB8.

Thanks