Y, cos DH with 0,5sec visibility/1,5sec invisibility have to aim with their WW ^^
I played with this rune in Haunt and for me, it quite sux. Better take normal Haunt and as main attack go with spiders or Spirit Barrage.
1 thing about WD - I see, that on good DH only way to kill DH is to stand still and spam SB. And just hope to kill this ghost within this 0,5sec
PS. One thing about Haunt. Maybe every other class think, that Haunt is just "click" and it will haunt enemy whereever he/she is. Well - it's not like that. I miss like 50% of my Haunts bcs of DH enter invisibility, some1 gone behind the wall, some1 ran away or anything like that. So it isn't like it will haunt you for half of the map