Assuming that Togekiss gets a fairy quick move (fairy wind is the most likely candidate), it will be a good DPS counter to dragon types that's also very tanky if they have dragon movesets. It won't have DPS anywhere near that of Rayquaza or Dragonite, but will be much bulkier in those matchups.
Also, if it gets access to air slash/sky attack, it may very well become the single greatest wall to Machamp where gym defense is concerned.