I realize this game is in its infancy, and the meta will change before too long (especially with updates), but I would like to gather as much data as possible. I would hope EA is paying close attention to this, but for the sake of this discussion, let us make two groups.
One lvl 35-50, and the other lvl 50+. Try to leave feedback only if you have played at least 20 matches in midtier or endtier or both. If we keep posts concise, it will help us gather data more efficiently.
I can only speak for midgame.
lvl 42, Burst AOE Comps. I seem to always see Bariss, Kylo and Sidious.