Actually, I think it's a good build. Momentum and GMA/Quad is a solid combo. And the thing is, if you can get 4 shots for 40dmg each, and even if only half of those hit, the 23pt Repeater Troopers have already done their job. Besides, they don't have to lay it all on the line right away; they can hang back and shoot until the time is right. Bacara having SS and Cunning Attack (esp with recon in the squad) is a really nice option which we haven't seen a lot of recently. He (and his ARFs) forces the Rex/Dash/Cads out there to get close if they want to do any damage, and that makes them ripe for a momentum strike. Make sure to protect your Repeater Troopers (Yobuck/Lancers will be major threats to this squad), but other than that, it should do well.