It's a real killer. ATMs are main weapon here, but you can dps with cLPL and UAC5s. Watch your heat on hot maps with this one.
2/5, I'd build it with HLL just for the alpha nowadays, and then rely on ATM/UAC for dealing dmg in between. However, the jack-of-all-trades concept just doesn't work well in MWO, and often you'll just end up being worse in all situations, compared to builds that specialize.