Well considering the standard Ghost- or Psychic-type move-pool I can think of a decent set.
Hoopa @ Lefties
EVs 252 Sp.Atk, 252 Spe
Modest / Timid
Shadow Ball
Psyshock
Substitute
Focus Blast / Will-O-Wisp
With Ghost + Psychic only resisted by Dark-types, I feel that a Substitute + 3 Attacks...