While playing my engineer today I noticed a possible problem with the Elixir U Haste Effect. I’ve had a search though the bug and engineer sub-forums but couldn’t see a similar report.
The tool-tip for Elixir U reads: Haste(5s): Regenerate no endurance.
However, in my experience I have seen Haste reduce my endurance to 0 first, then apply the stated effect (no endurance regeneration).
This occurred in a personal story instance and I haven’t had the chance to test it elsewhere yet but reducing endurance to 0 makes this skill extremely broken.