Completely stupid idea/question here.... but for a fun sort of 'mon (In tier of FEAR)
What about a Sylveon with Pixilate, Focus Sash, and Last Resort?
140 base power + 30% boost = 182 + Stab = 273?
Give it a Att/Spe EV Spread with Jolly, and maximize speed (To potentially outspeed pokes?)