Flygon works, I guess. Extreme Attack KO's the Gliscors on the bench. I think all you need is a way to keep Flygon Lv. X active [like Premeir Ball or something.]
If you can get a nidoqueen out then they are deal very minum damage to you while you are decking them with Wind erosion. This is if they are Burning poisoning everyturn to get a constant paralyzation lock. If they try to hit and run just snipe the Lv.X on the bench or Take out the spirtomb.
Yea, Ive seen that to. If that you then just Take out thier Spirtombs. And if they bench sheild then they are only hitting 60 with their attack and nidoqueen makes it 40 =/.