Well, I can't say I hate the idea, but I can't say I support it. Taking as little damage as skarmory does from physical hits makes counter almost worthless on it. In addition, the surprise special hits will still deal a hefty chunk. If you ever even think about running a counter set, I would recommend going Specially Defensive to buffer the random special hits flying around and increase the amount of damage you end up returning with counter. Don't like the idea too much, but thought I could make a suggestion.Counter-Skarm should at least be mentioned.
[SET]
name: Counter
move 1: Roost
move 2: Spikes
move 3: Counter
move 4: Brave Bird / Taunt
item: Leftovers / Shed Shell
ability: Sturdy
nature: Impish
evs: 252 HP / 232 Def / 24 Spe
With Counter, you are able to actually defeat physical threats instead of just "getting them out" and hoping something faster doesn't come in on you. With Sturdy, no matter how strong the hit is, you'll always live.