If you're going for competitive play, teaching your Togetic metronome wouldn't be the best idea, because anything could happen when you use that move.
As for a paraflinch moveset, here's what I got:
Togetic@Eviolite
Ability: Serene Grace
Nature: Bold (+def -atk) or Calm (+sp.def -atk)
EVs: 252 def, 252 sp.def, 4 sp.atk
Moveset:
Thunder Wave (duh)
Extrasensory (the best option for flinching)
Nasty Plot/Metronome (setting up or metronome)
Dazzling Gleam/Air Cutter (STAB)