Nasty nasty nasty. Good cooling, high damage output, and fair range. Heat is not even a problem. Named it "Bad Apple" because I was listening to such when I got my 1.2k dmg match with it, but forgot to snap a pic...
This is the same build I run. Second match in it was just a few damage shy of 1500... Still wasn't enough...
I might swap 2 of them for HLL, the same build can be done on a medium, even with good enough cooling (of course nothing near the insane hest efficiency on this mech). An XL375 should give plenty of tonnage and speed to work with