Skill Swap is unrated in Doubles. Wolfe made runner-up in VGC Worlds this year using Skill Swap Cresselia. In addition to all the uses you described with it, he could use it with his Heatran to give it Levitate to patch up its most crippling weakness, and with his Hitmontop to reset Intimidate, giving a -1 Atk to both your opponents. And if Cress has Intimidate and swaps it with a second Pokemon of yours with Intimidate, then you reset two Intimidates, which can cripple a team reliant on physical attacking. With your Mr. Mime set, have you considered Mew in its place? It has better stats all round the board except for equal SpA and worse SpD, which is offset by Mime's horrible HP, and Mew is much more unpredictable. Granted though, Mew can't learn Teeter Dance, but it can use Swagger instead + many more moves. Swagger also has the advantage of pairing well with any physical attacker holding a Lum Berry or Persim Berry. Also, you should either hold a Mental Herb instead of Leftovers or replace one of your moves with STAB. Otherwise, you become complete Taunt bait.