if u use the barrage..he will move the mg..and 2sec later sit like a duck in other place (look to the first replay)
You need to react on that, relocate your volks, flank him while he needs to relocate his maxim, and the bulletin allows u to quickly change the target for ISG barrage
Maxim spam is stupidly strong, and a pain in the *** especially for newcomers. I know that my advices sound way easier than they are in practice... it needs a while until you are able to optimise this strat, but as soon as u do, maxim spam shouldn't be a problem anymore.
I would like to know how u usually use your volks... do you blob them?