Pew. Splat. Kill. Repeat. I can fire all 4 ERLLs on Terra Therma and only hit 60% heat, so I suspect it's safe to do so in a completely unskilled mech as well. If you're in a poking fight, alpha the lasers and back down. If you're suppressing, then either two at a time or chainfire, and then when it's brawl time go heavy on the splat and follow up with lasers two at a time. First game in this, Terra Therma, skills are still skewed for an ATM boat.