After many play tests, the best solution to the MC-80 is massed fire on it's front arc, I found the best way to at least suppress it is to
maintain long range fire(red), mid range(blue) and long (red) seem to provide good results. Try to stay away from close range, that is when the MC-80 escorts will hurt you. I maintained a formation of 3 VSD in a V-formation and engaged at long to med range. By maintaining this you will get damage thru even though the ship can repair shields. The key is to continuously fire while the MC-80
maintains it's vector. The return fire is small compared to what it receives. This can work on each flank as well, but the return fire will hurt one of your ships. The MC-30's are a nightmare to deal with up close, so you can choose to pound the MC-30's to snail snot first
and then engage the MC-80. And if your opponent refuses to engage from the front, maneuver so you are in his rear arc. By staying a long range you negate the MC-30.