i think the tank gen has REALY powerfull anti air units and i think that they are over powered or unbalenced is this purposeful? because he has VERY few air units but i think his anti air units are over powered personally
He has the same standard aircraft as any other China. They have no extra health or armor, and their weapons are pretty generic. Theres nothing "powerful" going on, but they do cost twice as much as a standard Mig only because Tank general shouldn't rely on them as anything more than a anti-artillery defense.
I think I gave him a Mig31 in the last release. This is the same Mig31 that the other China factions have, same for Assault GLA when he uses china imports. It's a good interceptor but is slightly outclassed by many other pure interceptors. He needed the Mig31 because his early game air defense was inadequate.
If you're playing vs Tank General AI they can seam overpowered though. He uses a lot of them and Aggressive/Insane (normal/hard) get some serious health and damage bonuses on ALL their units. But I promise if you use them yourself they aren't all that impressive, and they're overpriced.