ive seen so much matches that 2strong team faced each....and atlast alies won IN LATE GAME.u can see the win rate% the teams who have rank as alies+axis and find out alies 4v4 team have better rate%.
maybe u forgot coliopie, just spam it and nuke 1okw base from range at once,what happen? yeah disapear in short time,also ive seen coliopies focus on heavy tanks...
said flank,imo alies dont need flank from side or behind

,they can easilly use that arty cover and rush with strong commets or any other tanks in front to front and eat most axis heavies.(no mines after matress or coliopi.....so road be clear)