you cant think lore master level 30-40 ish gets a stun immune cast effect which may stop the stun however no way to stop this, you are not getting stunned by everything i believe it is the wights carrying the staffs that do it correct me if i am wrong but kill them first you should be fine - i also am not sure but i think there is a fear that may be stunning but i have not done it in so long
It is a disease debuff which has a delayed effect of about 15 seconds. On effect it drains all of your power, and knocks you out for 10-14 secs... Just stack up on yellow disease potions and keep an eye out for that effect. pots have a 30 sec cooldown, so you should be able to remove the effect almost every time it hits. hope this helps =)
Different enemies use different tactics. Some stun you or knock you out, others put nasty bleeds, poisons, diseases, or fear into you. It makes combat interesting and not a completely mindless endeavor. Personally the one I hate most is being disarmed. If being stunned or knocked out is your biggest pet peeve then you won't enjoy the Dunland, I mean Stunland, area and all of the Dunlendings, I mean Stunlendings, who reside there later in the game.