Reposted with a, hopefully, correct title this time. Take a look and tell me what you think. This is how I am currently running mine and it is working well so far.
13 DHS for that hot weaponloadout @19% Cool Efficiency? Have you actually played this build especially on hot Maps? I find it's extremely difficult to handle the Heat. I suggest to either focus on PPCs or LPLas and all MLas as Backup.
i would rather call it unexpected heatshutdown ;-) jokes aside...even taking out all mediums and upgrading the engine for better speed, there it is still quite hot
This build has a bit of an odduck XL270 engine and it leaves almost half a ton of weight on the table. This half ton can easily be used to switch up to the much more common XL280 (or XL275 which comes with a few mechs). This has the added benefit of netting you an extra DHS slot in the engine, which you can fill by either dropping a JJ, or judiciously stripping a ton of armor from the head and legs. Finally, it looks like you went with a completely symmetrical build, which looks nice on paper, but in practice it is generally better to group similar weapons together to improve pinpoint damage. I would personally spec it like this, though some people prefer a completely asymmetric build where moving the LPLs to the right-arm would have the benefit of being able to fire all your longer-range weapons while keeping the left-half of your mech behind cover. Another thought would be to replace all of the MLas with SPLs which would help with the heat. The loss of range shouldn't hurt too much since due to the heat load, you would only be firing them once the enemy is starting to get in to the minimum PPC range anyways.