_ +1 HSL for ERLL put to use. More than 50% cooling means it will be quite cool despite 4xERLL heat and TC1 will increase beam range... It seems a solid sniper, but low hardpoints will probably make it not really worth it on invasion maps. ALT: replace TC1 with an additional DHS if you still feel too hot _
Not really. The stable invasion ERLL sniper BLR-1G "The starter's sniper" (5xERLL, TC1, LE350) + alt has 20 DHS, while this build has 19. If you really think it's hot, though, you can swap TC1 for another DHS.
4/5, I like this build. It's entertaining when you have range to work with, and the LE325 keeps it pretty mobile for an IS heavy. 20xDHS since it's slot perfect that way, despite being roughly 0.12 tons underweight. It gets hot if you brawl. But this isn't really a brawling build at all anyway~