The only reason I use KRU as the leader as opposed to Phasma is the speed boost. I have FOO sitting at 277 speed, and with the KRU boost, it takes it to 302, which pretty much guarantees me to go 1st (unless I'm against a RJT squad or Han).
From there, I do "Marching Orders" on FOST who then uses his taunt ability, which also gives all FO a 25% turn meter boost, which then pretty much guarantees that all of my FOO go before anyone else. It gives KRU the chance to stun someone annoying (GK, R2, Thrawn, etc.) and then Kylo a chance to stun another toon. Then FOX (Executioner) goes in and puts the hurt on someone.
So, my squad is generally: KRU, Kylo, FOST, FOO, FOX (all abilities on all toons maxed). Except against a RJT squad, this FO squad owns everyone (at least on offense, we all know how bad AI is on defense).