How much HP do you survive with? I cant imagine it being much.
You cannot KO it afaik. Sableye isn't powerful (maybe with FP, haven't tried).
lol, VGC? You don't want to use Sableye in doubles. Try a better defensive pokémon, like Klefki.
I cannot fathom why anybody would do that.
What do you plan to do to Talonflame after surviving Brave Bird?
If you take away the SpD EVs, you will not be able to take on special threats, as its not specially bulky until it has investment. There is no reason to add Def EVs just for one pokémon.