That's what I thought happened to me, but then again ive been vamp for so long I wouldn't know what's my base stat.
It's about 360 now on a magicka sorc. Is that right?
I find it hard to believe you had 900 health Regen on a nightblade, unless it is a tank. On my Magic Nightblade (Vampire) my Regen is around 300 on the tool tip, but at stage 4 because I never feed my Regen is basically 0. Only some kind of Heal or HoT makes it go up.