You could put him in for Rey and plo in for phasma if you want a full clone team. He gets a lot of turns and offense up with his basic and unique, plus his turn meter reduction is good. Plo would be the same as phasma except no advantage, but he also as a basic dispel which gets good around gear 9. His potency goes up a lot more at gear 10 I've heard. In the end he will do less damage than Rey but he might go more often, and it would be better to have him with echo rather than Rey with echo