The mist dose work, thats noch the Problem, but if you have the tactic "Deamonic Reach" (+25% range) it is shown that it's possiible to place the dissolving mist 80ft away and you will get cooldown time on that ability, BUT the dissolving mist wouldnd be there at 80ft away - if you place the dissolving mist in the range of 60ft it will work, but not at 80.
I compared it with a friend on with his sorcerer (pit of shades).
So I cant really detect if it is a Problem with the +25% range tactic or if it is a Problem with the dissolving mist. All the other abilities in the path of changing tree are working with the +25% range. Thats Kind of weard.
Would be thery nice to see that fixed
