Basically a more heavily armored, faster, less armed version of the ''Relentless''. Works just as well, best at range.
I would drop the DHS (you already have -10% heat gen quirk, so there is little to no point to fit them for just 2-3 medium lasers), fit a 3rd ML and the ECM... Armor on arms is not very important due to the fact they are not excelent shields and there is basically nothing except for those MLs.
That's crazy you don't run out of ammo. I've been running Relentless with only 2 ERML for the extra ammo and I still run out most matches. Gets you those tasty 1200+ damage games though.
It's easy to take an LE285 instead of an LE300 and put the tonnage into ammo. You'll be maybe 2.5 kph slower, but you get 50% more ammo for the LGR. Might be interesting for the trigger happy crew here A LE295 is 1 ton lighter than the LE300, so as long as you're not using the internal heatsink slots, I'd at least run a 295 for 1 ton extra ammo. I have some mechs with just 2 LGR where I run out with 4t. Due to the sluggishness you'll probably not live long enough to use everything, but you should fire approximately twice as much ammo/second.