I have used Specially Defensive Skarmory extensively, and while it is a very solid mon, it shouldn't be your answer to Tornadus-T. Tornadus-T has all the time he wants to kill Skarmory with confusion hax, thx to Regenerator. First of all you have 15% chance to lose from the beginning (30% the chance to get confused *50% the chance to hit yourself). This chance becomes even bigger if you account for the second hit that Tornadus-T will land, so the chances of you getting confused become even higher (25% of you getting confused and hitting yourself after 2 hits). Even if you don't get confused the 2 first turns, Tornadus-T can come back again later, or simply stay in and bash you with Hurricanes until you succumb. Skarmory only has a 3% chance to 2hko a healthy Tornadus-T so this is not helping either.
So the point is that specially defensive Skarmory is not a counter to Specs Tornadus-T, only a check, and a bad one. The only thing it can do for you, is to scout his choiced attack, so that you can after go to the appropriate resist (Heatran for Hurricane for example, or something else for FB).
But specially defensive Skarmory is an ok counter to LO Tornadus-T, as Hurricane only 4hkoes without SR, and Tornadus loses life with each hit, so you can actually stall him out, barring insane confusion hax.
So the point is that specially defensive Skarmory is not a counter to Specs Tornadus-T, only a check, and a bad one. The only thing it can do for you, is to scout his choiced attack, so that you can after go to the appropriate resist (Heatran for Hurricane for example, or something else for FB).
But specially defensive Skarmory is an ok counter to LO Tornadus-T, as Hurricane only 4hkoes without SR, and Tornadus loses life with each hit, so you can actually stall him out, barring insane confusion hax.