Vader lead. I voluntarily relinquish MM so that they can get TM back when it gets down to zero, then TM swap with Thrawn. With cooldown reduction, the MM is effectively infinite and Thrawn can often (though not always) use TM swap special two turns in a row. you can use Phasma as a backup in case Thrawn's TM doesn't work for you (+50%TM to all Allies). If you have him geared, of course you should throw Gideon in. Tarkin, of course, is mandatory.
Vader (L), Thrawn, Tarkin, (Phasma?), (Gideon?). .