Mod set for sion

A sith team really needs to be as speedy as possible. I run a speed set with a potency set on Palp, with protection primaries on the circle, cross, and triangle, at about +100ish Total. Speed and CC or health sets on thrawn with protection primaries on triangle and circle and offense on the cross ( ~120 total, offense cross is only because it's the highest speed one I had available). Optimally you want Sion to go before nihilus if you don't run Vader ( like I normally don't) by TM swapping with thrawn. My nihilus is at a little over +110 speed iirc, and against other zzEP teams he will always go as soon as their Vader pops his aoe, allowing some quick cooldown increases. If you use sith trooper, stack as much protection and tenacity as you can, since he is only there to soak up damage and throw offense down around. Sith really don't need a ton of extra offense from mods, since they really function by overwhelming the other team with TM gain, stuns, CD increases, and Nihilus's annihilate. Once you get those debuffs to stick and expire/reapply, the battle will quickly accelerate. Speed, protection, and potency to put it simply.