Modding B2 Super Battle Droid

Some people say all Potency, but after switching mods around, it don’t have to be all Potency. I dropped my B2’s Potency by @50 and he still does around the same amount of buff immunity. Matter of fact I’ve also noticed that GG’s leadership ability is crap and don’t work correctly either. It say the enemy will have -50% defense, but if I put Asaj or Poggle in as leader, my characters ALL do the same amount of damage...can u believe that crap! They really need to fix that!