I'm testing XL long range builds for the King Crab and this one works pretty well for me: "fast", low heat, long range on both weapon systems, no uac jams I really like the high mounted ERLLas...they pretty much make up for the low ACs. Edit: STD Version without AMS
(Assault) fast, high pin point at medium-long range, runs cool. What else could you ask for? I generally prefer UAC5's but for the extra speed, ammo and large lasers without jamming when someone is in your face I decided to swing with AC5's This is my CW assault for sure, fast enough to get to the base or move about it defending, good weapons for all ranges and enough ammo and energy backup to last a while.
4/5, pretty much what I was looking at for this mech. standard engine + erll's , it's fast(ish) has good damage potential, and at range too.