MDD-A "Crit Dawg" (6x SRM4+A, 1x MPL, 1x MG)

Just something else I might try later today. Not sure it'll actually be any good, but i'm hopeful.

 

Single MG is utterly useless. You would be better off having a shield arm, or some ML/SL/SPL, or DHS.

 

How about this then?

 

SRM4 is grouped ok enough to not use +A. If your mech is going to stay in this build for a reasonable amount of time you can consider to remove that.
But yeah, this is more reasonable.

One of my versions.

Feel free to swap DHS for a TC1, or change ammo size, or scrape some armor for half a ton of ammo, etc.

My suggestion to your build changes.