5* Nihilus (no mods, gear 8), 4* Maul (4x Offense, 2x Health mods, gear 8), 7* Vader (g10) Palpatine (g9) and Sidious (g9) with spare health mods.
My Maul and Nihilus aren't invested well-enough to T3 easy, but I was able to get it done well-enough. I was making the mistake of thinking like GW or Arena and would target General Kenobi first because he's a big mean bottom-head (the original word was censored :P ). It also took a few tries to get the timing right on using Dark Gambit to fill up Nihilus' meter so he could Annihilate Yoda first.
But, yeah, Annihilate Yoda and the rest of it is easy...