Old meta, but it has became almost useless with new tech and ERML (it's too hot now) It could be worth it compared to the classic 6xERML build in some very niche situations 2xLL+1xERML loses in both maximum and sustained DPS at ERML optimal range, BUT they win by a significant margin at 450 meter and above (ERML deal 4.3 dmg/s, while LL+ERML combined achieve 5 dmg/s) while achieving a slightly better alpha strike (3.3*6=19.8 VS 18+3.3=21.3 This build basically "trades" 1 DPS at +90 meters of ERML. Due to longer burn time and lower maximum DPS is a bit too weak against lights, though, so a classic ERML wolfhound can easily get closer of those 90 meters and win both DPS and alpha strike race. Spoiler: Chart For these reasons, the best vomit laser build so far is the 1xLL+5xERML, which combines the best from both worlds, despite being slower.
This one is actually very interesting because it doesn't waste armor for a single arm and ERML, but 58% cooling efficiency without skills seems a bit too cold. I definitely should try it out, it looks like a very good flanker.