Just Han and Luke? Nah, add Dathcha. He gives another method of turn reduction, and will call Luke or Han to assist for even more turn reduction.
Stack potency above all else so you don’t get resisted as often. If you’re doing it right, Greivous won’t even get to go so you don’t have to worry about the enrage. Hell, this morning I hit 3m damage before using Escape on Luke so I could use him in p3, after which I let Han and Dathcha go until they die. This also left a decent chunk of health on Greivous so more guildmates could get a hand in.