EDIT: Outdated after the introduction of IS-Quirks, click here for MK.II I had quite some fun with this (I must admit very simple) setup since 12v12 was introduced. Runs cool, moves fast and is an easy to handle Sniper/Long Range Support. Adv. Seismic Sensor + Adv. Sensor Range installed AMS-Version:
this is quite impressive, as you have a sniper set up with good close range defense. You should really adjust your armor the way you want, but that's ancillary. 5-5 stars.
it's really cool, I don't care about the heat meter anymore, Lasers for short range (or long range btw) plus PPC for sniping -and Advance Zoom Module
When droping with some friends (at least 1 LRM), I usually equip a TAG in exchange for some armor and BAP instead of AMS. The TAG at the 9M's head it let's you target enemies over ridges and other mechs. My favourite mech for long range support and sniping
This build is a beast! I usually score 600+ dmg, even on hot maps. The mobility and the heat management are just...awesome!