I would hope that I would have stripped them of a couple of counterspells by then. though as someone pointed out awhile ago the problem with Tainted Aether is that they get to choose and they will usually make the worst choice for you. Still in theory it is so nasty that it is very tempting to try. I just havent been able to be satisfied with it enough past test draws to use it in a real game. Also the 4mc is a big problem if you are not running Dark Rituals.