Light screen-boosts up special defense. Ice beams don't do as much to him now. Most physical moves are fighting, ground, and rock type. He resists figthing, is immune to ground, and can deal with rock types using his sweeping move.
roost-Restores health. Very annoying when used with multiscale, light screen and leftovers.
dragon dance-Boosts up attack power and speed.
dragon claw/outrage-Sweeping move +STAB. Only steel types can resist this move.
If you want even more fun, try baton passing defense to him beforehand.