A simple, no frills brawlin' crab that has served me exceptionally well. AMS is optional, I like to keep it to support my team's heavies and assaults. It can be switched out for an extra DHS or more armor.
I run my 27b very similarly, but why shave armor off the torsos? I'd say run less AMS ammo and max the armor (or completely dump the AMS system and add another heatsink).