Might be controversial to say this, but if Axis have been given enough time for Big_Tusked_Animal/Bigger_USF_trolling_Hunter_cat + each player to have Panther spam (which is fairly incredible at 185 FU each!)...you're pretty much finished. It's over imho. You'll never be able to outtrade with armor vs that kind of setup and once they've won the armor war...the infantry are next.
You cannot afford to give Axis breathing room. OST might be considered memeworthy lategame but they can still spam Panthers, Brumm +PZwerfer.
yeah... very hard to spam panthers with inflated ressources... and also very hard to hold out long enough on campy maps