I've been using offensive calm mind slurpuff alongside swords dance feraligatr, and so far the two seem to work pretty well together. The great thing about this core is that each can set up on some of the other's revenge killers. For example, gatr sets up an sd, shiftry revenge kills but then slurpuff is there ready to grab a calm mind. Or it can work the other way around, if a fast scarfer like pyroar revenges slurpuff, gatr gets a free swords dance.