Regarding the May 21st Update i started to add MGs to all Ballistic Mechs out there after packing some Big Guns on them first. Here is what i came up with, it has maximum standard engine, good medium range and reaches even to long range. What amazes me is the good punch it has in close combat and zombie mech capabilities as i dislike the XL engine nowadays on non shield arm mechs. Damage is about 500 each match, with last mech standings usually.
I have run something similar but without the MG's, damn nice setup. The only issue I have is the lack of AMS, you will have to be careful in movement planning or drop with a ECM buddy/AMS toting pack.