I've tried a lot of combination, finally came out with this. It's hot but manageable. MPL for close protection. I was surprised how many times I've got a kill or saved myself by AC2.
Why use XL250 when you can use XL255 at same tonnage? Oh ERPPC is hot I would suggest dropping the equally hot AC2, maybe drop some stuff and upgrade it to AC5. That way you ahve mroe firepower and less heat.
I didn't have XL255 but I have XL250 on stock so I use it. I've tried with PPC & AC5 but somehow it just didn't work for me.