had vader g10, palp g9, rg g8, tarkin g8 and tfp g8 and found the final teir a breeze. To be honest tfp didnt do that much for me, vader rg and palp did all the heavy lifting. I modded all for potency and speed except rg who was potency and protection. Palps stun and vaders culling blade are the key with this team. The others exist mainly to add debuffs for vader. Do whatever you can to unlock R2, he is an asset to basically any light side team. To be honest, he's at least on a par with GK.