[@Howler] I know you're still making edits, but more feedback:

MAS is looking pretty good- keep in mind that plasma is not particularly slow, nor are they just gobules of liquid, they are concentrated bolts of powerful energy. I'm not sure if implying that plasma itself was slow, or just plasma of that power level. Either way this my comment on this is just trivial information. 

Your MAS has a lot of point defense. Keep in mind that I will allow you to install a full-scale autocannon to your MAS's arm or something as a weapon for only 1 WT, the main issue would be it having considerably lower ammo count than a full on primary weapon. So for example, if you wanted to ditch the .30 cal guns, I'd allow you to install 20mm autocannons or rotary cannons onto the Mosquito's arms, with like short magazine of 100-200 rounds or so. 

The suspension system as your MAS is currently built is not needed, your weight total is currently only 12/15, so by giving your MAS a improved suspension system you're just draining on its power.

Also, I believe your MAS is currently without shields. Something I would definitely not recommend.