EDIT: the LE325 variant was better, so I've edited thread title and the thread itself to reflect the change. Very similar to a 2xGR + 3xERLL nightstar, but with ECM, cooler and probably tankier despite bad hitboxes. Hill poke and you will likely win most trades at long range. Don't be fooled: this build is extremely nasty with this 30+27 damage with the lowest optimal range of 750 meters. If you manage to aim properly, it can pop components very easily at range. Skill nodes are almost the same: max ECM, max heatgen, range and ammo, skill into armor. I'm pretty sure you can avoid operations, but hill climb will almost certainly be VERY welcome. EDIT: final recommended skill tree here ALT: LE325 version with 5 ton of ammo, but less armor and -1 DHS. ALT: LE300 version with +1 ton of ammo and TC1
UPDATE: this build is very nasty and powerfull. LE325 variant proved to be better than the original LE300 and has been succesfully used in both group queue and FP. This build also made obsolete the aforementioned NSR-9S "Nein Strike" (2xGauss, 3xERLL, TC1, LE300)