dark revelations worked now

Cant do
highmountain secrets - npc is there but when i approach it, dissapears so i cant communicate with npc and get additional quest
highmountain stands- no video sequence and i can't attack dargul
the nighmare lord- when i enter cave it doesn't count and i can't progress quest- i did it on other character, so i assume my character is bugged, not even mobs in the area wont attack me
vault of valor-mobs won't attack me and if i attack them they loose aggro really fast and go to their spot healing to full