Smokecreen (changes in red)
Vanish behind a wall of smoke, becoming momentarily invisible for
Rune Lingering Fog
Increase the duration of the effect to
Cooldown 3 seconds.
Edit: Further it seems, that monsters are following you if you are invisible, but don't attack.
This timeframe of 1 seconds will be enough for fast moving monsters to kill the Demon Hunter. We will see, if the Demon Hunter can find a work around for this problem or need better gear to farm elite packs in inferno solo.
This means for me, if I don't play in group I go back to gold farming.