dunno if this has been mentioned, but this is very useful for warlocks and SPs, as it shows duration of dots, and also helps you to keep on top of renewals... or so i've been (un)reliably told.

The popularity of this mod is probably the reason Blizzard implemented their own version of DoT timer.
Unfortunately for this mod, it this does mean that it's less useful now its basic functionality is built into the GUI.

Still, DoT Timer still has some extra features, so if you don't mind the extra clutter then it's not pointless.

try nature enemy cast bar it's show's alot of cooldowns or durations of dot's or when the mobs respawn again can also put some stuff off or extra on