OK I switched to paladin school to try it out and went to tomb of borannis.
When i hit stand against darkness i got message
"Your enemy is immune to this type of attack. You msut change your attack if you wish to engage this enemy."
Then when i hit Life Strike VII i get message
"This attack requires fighting with Life"....wtf?
(got tons of Life skill from Healer school so that shouldnt be problem...)