I'm running a somewhat similar build and really enjoying the raw stopping power of it. Having a light mech running into me around a corner and then wasting it with a full alpha to the torso is wicked fun!
Maybe I'd focus more on the long-range poke, burst doesn't work well with regular c-lasers. can swap TC1 for another DHS but the former has more impact in-game I think.
you can chain, but yeah forgetting that ERLLs have different amounts at which they produce ghost heat.
