Here is a demon hunter exploit guide: Demon Hunter Legion Exploit Guide 7.03 - YouTube
What he didn't mention this in the video but the dh infernal strike method at 2.05 works for rogue grappling hook and warriors heroic leap also, these are essentially the same abilities for most practical purposes. Three players could win the game in 2 minutes.
This is quite a powerful technique: it seems at first hand you can't do much with these abilities because you get constant "you can't use that here" error messages. The trick is to use the method downhill or at equal height as much as possible and on the very edge of the lip of a slice of rock. It has applications far beyond this battleground.