What about this?
Downgrade ERPPCs to PPCs
Delete a pair of DHS, downgrade ERMLs to MLs, and add another pair of MLs in nose.
Now you have explicit fire-patterns: LRMs at Long, LRMs and PPCs at Medium, and two PPCs and four MLs at short.
A full-energy centerline is only +2 on the blip, and turning fights means you'll be at a cool 22 heat generated by nose + engaged wing vs 30 capacity.
A more outrageous variant that I can think of would pull the LRM-20 completely for two MML-7 mounts, three tons of ammo, and another pair of DHS to let you introduce your enemy to 14 SRMs on the merge as well.