This has been a fun variant I've been running around to pretty good effect. The 2 ERLL are so you are not completely useless before you are in brawling range. Once up close and personal, firing the the ERSLs in groups of 5 deal a surprising amount of damage that most people do not expect. With full armour, this setup can take quite a bit of punishment as well. The key to remember is not using the ERLLs in a brawl unless absolutely necessary as firing them in tandem with your ERSLs will probably push you over the heat threshold. You could drop the CAP for an additional laser but I find anything more overheats too easily.
Still have some tonnage left. Suggest putting all two erll to the body for better converging attack, and all ersl to the arms. You can drop some body dhs for bigger tc.
Problem with switching up to bigger lasers is the heat management. With the current setup I can keep firing the ersls in groups of 5 up close for quite a while without worrying about over heating. There is extra tonnage left, but I don't think it is a must to max out tonnages.