Ah I see.
I'm no FO expert
but my theoretical best FO
is
KRU lead, FOEX, FOST, zKylo, FOO
Everyone of this team has a crucial role.
KRU: Durable Tank, Stun
FOST: 2nd Tank
FOO: Fast, TM Manipulation, Cooldown Reduction
zKylo: 2nd Stun, Durable Attacker
FOEX: Buff Removal, Long run Massive Hit, Back to Back Attack, Durable Attacker
The reason I left out Phasma and two generic pilots are
1. They are all very slow.
2. They are not essential.
Phasma: Extra Advantage & Speed down -> Can be negated by buff removal/Cleanse
And we have enough advantage to keep the turnmeter gain rolling. Plus one character can only gain 1 advantage at a time. Phasma's additional advantage would be more often then not, a redundant one(Everyone already has advantage). I would prefer various buffs rolling to feed hp/prot better.
FOTP: Hard hit, but squishy, and as I said slow. Slow and squishy characters don't do much no matter how hard they can hit.
FOSFTP: Additional stun, but squishy and slow again. And we got enough stun from KRU and ZKylo