Ok, since the last answer had...questionable sets, I want to try and give you a set that actually works. First, don't use falinks. There is no reason to use it, it is slow, and...bad. While it does have defiant, it just gets outclassed by the urshifus, kartana, and other strong physical sweepers. While it does have defiant, it still should not be used.
HOWEVER: If you are hellbent on using it, I suppose I could help. On top of that, being set up reliant in vgc is a horrible plight.
Falinks @ Life Orb
EVs: 252 Atk / 4 SpD / 252 Spe
- Close Combat
- No Retreat
- Rock Slide
- First Impression
This would be played well with regieleki.
Regieleki @ Focus Sash
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature (Eleki Speed ties make vgc suck, just use timid)
- Volt Switch
Overall, use an urshifu form, they are far superior.