My Skarmory in Emerald

[Infinite Master Sceptile]

I've trained a Skarmory to take on the E4, and I don't want to breed. I just want a moveset that will work.
Current moves:
Air Cutter
Steel Wing
Swift
Spikes
It's terrible, I know.

 

[Broodstar]

Skarmory@leftovers
-spikes
-roar
-Arial Ace/Steel Wing(since you don't want to breed)
-Rest/filler
Spikes...spikes...roar, inflict damage, spikes, roar, roar, roar, yahoo.