Which one would be better for a mainhand dagger (Fang of the Faceless)? And does it make a difference if it's PVE sustained damage vs PVP burst damage? Or would Crusader be better than both?

Also, I know that Agility scales better with gear but Crusader starts out farther ahead, so if I'm using mostly NS and bloodfang hood while offhanding a Quiraji Sacrificial Dagger, would Crusader be better as an offhand enchant than Agility?

Lastly, if Crusader's damage equals slightly lower than either of the other two, would the healing make up for it in pvp/pve?

headshot and teink departs from this mortal coil

to the heap!