[Wdll]

Yeah, don't try it.
The only time this worked good was when the enemy had no air defence worth while, left.

In game terms, it depends against who you play.
Against the AI it is easier to suppress or kill their air defences. Too easy. The problem/issue is the AI does not move his air defence assets. Send a couple or drones or whatever to locate his air defences, then fire your artillery like crazy.

You can also try to flood their air defence system by having ****load of helicopters and planes move on the same turn. Just make sure after you move a heli and it gets fired uppon, move another heli, not the same.
Basicaly try to make the enemy use all its defence as soon as possible.

Against humans it can get more difficult. Sure, in a single battle you might be able to fool/surprise the human, but in a campaign game that he knows you have invested heavily in such a force, he will take the appropriate measures against your units and neutralise the threat.