Got Starkiller, what happens with Darth Vader now?

Should I even take him the mods away or is there a team where I can put him into.

Also I gave Juhani a Omni and Zeta, should I also use her for GA or should I level up Old Ben?

Here my Roaster, maybe you can build a team for me: https://swgoh.gg/p/143392522/