5th geonosian

I usually use ig88 because he's doesn't make my bh teams.

My best suggestions (all toons I can spare, otherwise Rex would be obvious):

Old Ben, (Leader, TM gain, ability block and Tank)
ST Han (Leader, TM advantage, defence and a tank)
Shore Trooper (Pre taunt)

Bring on the queen and her zombies

If you're using Poggle as a lead, I would suggest a droid for synergy purposes.

I put phasma for the TM boost special

Either Old Ben lead or adding B1 in my opinion
Old Ben lead will synergise will the foresight they gain
B1 will heal them and give them extra tenacity

I put Rex lead, and then tossed Plo in the 5 slot of my clones.

Poggle lead and use b1. He will heal them and he will assist with each of their abilities.

I put in Grevious. Because.... why not.

Barris is viable cause of their max health bonuses. Sweet 20% heal on crit and a reliable cleanser to keep debuffs off them