Fun build, working on getting it elite'd atm. The 2 LLas are you main damage dealers since they are arm mounted they offer better aiming flexibility. The 3 MLas are for short to mid range punch and can be chain fired to help manage heat. The LBX is for critting on mechs that you have already punched holes through with your lasers. The LLas could be swapped for ERLLas but you would not be able to freely mix them up at closer ranges without some heat trade off. Would work well for Long range sniping support. If you want more single point damage you can drop a ton of ammo from 45 to 30 and swap the LBX to a straight up AC-10. So far she's been a good fast striker and a responder to situations that need some more firepower added in. Fire, turn, duck and weave then fire again helps to offset your XL. Enjoy! Will posts SS's of a good match or 2 later!
