NPC boss team to fight with skills that rival those of actual players, like if you go after the healers the tank and dps will go all out defending them, will be able to take 'aggro' making you unable to deal damage to anyone but them. They will be able to use combos as well, so a take on moogle fight but with more random chance involved. Could be bad guys like garleans or good ones like the job/guild masters. Would up the challenge if everyone on NPC team could heal one another, not just healers. If you bring all of them too close they will wipe the PCs with the combo, so flaring isnt the answer xD