Depends on your build. If you apply curses and weakness all the time, it's some (not too noticeable) buff. Movement speed and max health / ES aren't that useful IMHO.

AFAIK, in solo play the skill is currently mostly taken for rage based builds. The ailments on yourself count as "hits" for rage generated on being hit. You can in fact get almost endless rage this way. On the other hand, getting enough rage isn't too difficult anyway...

Hi,

I play sorcerer and the ailment inflict damage straight to my life. I don't have much life as a sorcerer and it's not viable. Am I missing something ? If my shield could take the damage that would be useful!

Same kind of problem with the unique staff Zapstick, electrocution damages hit my life first.