Hey, this isn't a huge exploit but I'm sure someone might find a use for it,
Wizard has an ability Teleport, and a rune called wormhole
This rune lets the player teleport an extra time before the cooldown starts.
Here's where it gets interesting, I'm from australia so I have around about a 200ms ping on good days (like now) on this "lag" I can teleport up to four times before the cooldown kicks in, I'm sure if you have a worse connection or on bad days you'll be able to teleport multiple times theoretically bypassing mobs of any sort (stupid rng of rares that you can't kill solo in inferno? Teleport spam past them.)
Might also be common sense, but not everyone will realise you can spam the button to TP multiple times.
Hope you enjoy.