Silly easy to use and fun light LRM support build. I recommend binding all the weapons in each arm as a weapons group. Having low swung weapons it is easy to hit the terrain in front of you when moving over uneven ground. Fire just a LRM5 and a LRM10 for sustained damage as this will not lead to you overheating even on Terra Therma. Clan LRMs don't have a minimum range like the IS LRMs do. If you do find your self less then 200 from you target be sure to lead your shots even if you have a weapon lock on them or your missiles will miss regardless. But I don't recommend getting that close... ever. Here is a screenshot of my best match so far:
I think i would make this tradeoff: 10 missile tubes, and the cAP, for ECM, a cMLas for defense, and more ammo