Every1 have diffrent thought on the orc stats but 1 category i think is worse then the vulnerable catagory is the "Dazed by" category.   Yes u can deal more dmg to orc´s with vulnerable traits but if u daze an orc u temporarily disable all of there immunites making that near perfect 4-5 immunites orc almost worthless.  For that reson i will almost always take an orc with no daze effect over 1 with no vulnerable effects.