Never bothered hiding in dungeons--the time lost getting to the mob outweighed the 300 potency attack [500 from level 32-45]. It'd put me behind about 2/3s of the full combo and two mutilate ticks behind. It was a dps loss.

Did use it to sneak the occasional treasure coffer tho.

After a while, put hide on a secondar crossbar and NEVER regretted it. It's fun to go BLAP500potenceeeeee but not practical.