So this is something I've been fiddling with for a while now. I'm not 100% certain about the build, but it seems solid enough. It has good DPS and a decent spread of weapons across mid to short range, but I always seem to die a little too quickly. That could just be poor piloting on my part.
I run a similar loadout on mine but with artemis to concentrate the SRM spread. Trade the 285 for a 275 and one heat sink. Can work pretty well but not entirely convinced yet.
Would if I could. The only reason it has the 285 is because I ran out of slots. I could downgrade to SRM4's with artemis, but I'm not sure if that's best.
I am currently running (and advocating) this. It's a hell of a brawler offering a lot of flexibility and a deadly punch < 300m. I was about to start an own thread, but your build differs only in nuances, so there you go. The 275 still offers enough speed for this kind of mech, and Artemis more or less allows to use the SRMs at maximum range rather than only from about 100m.
Basically, a brawler. LL in it's own weapon group, ML and ASRMs in 2nd, and 3rd group is the MGs. Use the lasers and missiles to strip armor, then crit the internals with the MGs.