Well our guild has now adopted a "once a month and improve before next time" approach. i.e. every month we're going to summon the Heroic Tank, see how well we can do, and resolve to improve our individual anti-Tank toons some before next month, etc.
So to that end, I built a Phase 1 team of Commander Luke Skywalker, Han Solo, Qui-Gon, Ugnaught and Datcha as the leader. It worked reasonably well but the last three characters were too squishy and even Han didn't last as long as I'd hoped. So the way I'm going to improve my squad for next month is to get them all to a higher Gear Level (except CLS who's already 12).
But now we're on phase 2 ... er ...
I have a First Order team - Phasma, both Kylos, Executioner and Officer - all g12, all fully modded. They did just 5% damage. No where near good enough. I'm wondering if I even bother with my Phoenix team if that's all First Order can do. I was hoping to keep my Resistance team for phase 4 as it can solo it on Normal mode but at this rate we're not going to get to phase 4 so I'm tempted to use it now and see what happens ...