Spread out, save your CC break for emergencies, keep an eye out for each other = easy fight.
too much thinking for someone used to easymode 50 fp with black hole gear.
improved mechanics in 55 hm are really what this kind of endgame content needed. not everyone can daily run ops(where fights are mostly at this and further level of complexity) and this is really a way to make people enjoy their level cap and not just run for the daily gf commendations.
and activate bonus bosses since they drop black market is another good thing imo.