Need help with a CB NM/UNM team

Thinking about running a counterattack and ally protect team with Sepulcher Sentinel lead, Skullcrusher, Ninja, Tyrant Ixlimor, and a 5th (maybe Frozen Banshee). Problem is I have no idea how to gear them to make this even a 3 key. Any help or a different team suggestions is GREATLY appreciated.