What armor and structure are you using? It looks like you're using LFF, but it looks liek you coudl drop that and replace it with Endo to get some extra free weight in there. HMGs seem like a difficult combination with HPPCs given the wildly different ranges. You might want to consider LMGs Combining that with a switch to Endo might let you just go STD engine and give you some zombie time. Should give you room for more DHS as well then since the engine will take up less space.
