Sith Marauder best used with...?

So have my Sith Maurader full G12 and want to know what’s the best team to use him with in the arena. Been running EP (lead), Zader, DN (unique Z), Thrawn (unique Z), and GK.
For Thrawn I sub in SM, Sith Trooper or Shore. SM doesn’t seem to be as dominate as Thrawn in that squad.
Also had a zetaed Dooku I have heard mentioned may work.
JTR dominates my Arena now with some NS and now EP lead. Any thoughts are welcome