Just 3xcUAC5s (somewhat classic chainsaw) felt kind of boring to me especially without backup weapons, so this is what I am running in pub-games these days. (Modules: Radar Depr., Adv. Seismic, cERML-Range) Heat is manageable if you don't alpha your ERMLas all the time, the UACs will jam at some point so there is enough time to cool down. I use the cUACs for supressing fire (even assaults will turn away), cERMLas chainfired (constant damage, easy heat) or alpha (finisher, a bit hot after 2). A Coolshot helps if you want more alpha-power, but it's no must-have. 1k-dmg approved: