Takes advanatge of the ERL heat reduction and uses a STD rather than XL in case you lose a torso. Running a STD rather than XL has proved useful for me.
I'd have to agree with Enileph. While everyone likes a zombie mech, lights are made for speed. You need to be able to lay a few blows with the ERLLs, change position, poke again. the 210 engine just doesn't offer that ability. Don't forget the engine affects things like torso twist and turn speeds also. This is the build I personally run with lately. It's a little warmer, but quick.