Alright I understand that zerg suck against air units and am fully aware that i shouldn't let them get far enough to mass battle cruisers and carriers. But when playing a game against two friends of mine one a terran player the other a protoss player(both somewhat n00bs) they have an affinity to go for air forces. They rarely expand and fortify their base so that any ground or air based offense are useless in later game. Generally as the game plays out i can drop a nydus worm in one of their bases filled with roaches and wreak their economy. However my strategy is mainly used for 1v1 matches and thus I can crush an enemy but the cost is I can only do it once in the first 7 or so mins. By the time I have annihilated one of my enemies, the other undoubtedly unleashes his air force upon my base as I have few units to defend it let alone a hive and corrupters. After this I often fall back from expansion to expansion until I have one left surrounded with spore crawlers and spine crawlers trying to build up an air force to rival that of my opponents. At this point in the game I know it is futile as these troglodytes i am fighting will have somewhere between 15-20 of their main air unit. Unable to expand, running low on minerals and with an army made of bloated squids and well-hung bats(I discovered hydralisks become useless against later game air forces) I attempt my saving grace in a massive clash with my enemy. It Fails. Tl;Dr: What strategies are there for zerg to wage a war on two fronts against turtlers with air superiority?
the nydus drop is great vs noob turtlers, as for aa. get corrupters (not all by themselves though) for heavy stuff, otherwise mass mutas and hydras. I'm not a top tier player but IMHO in late game you should be switching to hydras off roaches for the most part especially because of their aa
Honestly, if you are the only guy in this group of 3 that is pretty good at the game, you can't win. Everyone knows that in FFA, the second best player wins because the best player gets 2v1ed. Maybe if you just get a ton of spine crawlers and corrupters and brood lords, and fortify your expansions as well, then maybe they will attack each other and you will have a chance.
... corruptors with full armor destroy battle cruisers so I'm not really sure what you are trying to say.
