Just crafted myself a Blood rage outfit on Lamaland to try how it would work on my caster. The problem was it was not working at all in undead form. Was working fine when out of form and not at all when in undead shroud (vampire).
This was the effect I was personally the most interested in....oh well.
Is it because the negative of it is supposed to make you exhausted? Well I heard it works fine on warforged and they have same "benefit"
Would be nice to know if this is indeed WAI or is it a bug?