Full Geonosians team. If you don't have them farmed then bunch of random separatists under Nute lead can also work very well, but we have to see your roster for more detailed answers.
Brood alpha and his gang are solid but I personally love Nute Gunray lead, he is SO UNDERRATED. I use him with Dooku, Ventress, Droideka and magnaguard. Really basic separatist team that can do some heavy lifting for you in GAC against other borderline metas. Profit cripples tanky teams
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Geonosian Brute Alpha lead
https://swgoh.gg/u/doxin/
Just another side note, make sure you join a guild because you can get really good rewards from territory war, territory battle, and raids.