The heat build.
Shutdown takes away enemies'turns so they deal lesser damage
If u are using energy after energy break the enemy still can use energy free weapons, and there are A LOT OF energy free weapons in raid mech sets
So general idea for nice score is simple but needs tons of premium items:
Crimson Rapture+Overlooking Oven+Heatbomb/premium (maybe 2)Heatbomb+swoop+superb charge+tons of heat module+vest torso+massive feet+3 fortress