Q:
Well of Blood Duration
A:
A year or more ago the duration of WoB was changed to 5 seconds from 10 seconds.
Unfortunately, Anet “forgot” to up the scaling of healing power with the change nerfing the overall healing dramatically. Vampiric Ritual siphons were also closet nerfed on WoB due to losing 5 seconds of possible procing.
It used to be 10 seconds but now it is 5.