Not really, I shred them to bits with my Skyguard (or even Archer nowadays, ironically. Its AA capabilities pointedly haven't been nerfed at all). As I recall air stopped being any kind of danger to grouped armor a couple of years ago. One repair sundi, one or two skyguards and thats it for AG game. And its especially so in tank farm configurations. They're usually accompanied by at least one deployed sundi. Effective AA options are plentiful on a moment's notice and air doesn''t really present a threat except to isolated solo vehicles.