I'd say First Order Executioner is a must have too. I'm building a FO team for TW around this character and it's really fun experimenting with it in Galactic War. The team:
ZKylo Ren Unmasked(L), g9
First Order Officer, g11
First Order Stormtrooper, g9
First Order Executioner, g11
First Order Special Forces Tie Pilot, g10
Basically, Kylo and the stormtrooper protect everybody taunting while the officer and the pilot feed the executioner with TM so he hits the other team hard. There are lots of possibilities with this team.
