Nightwing wrote:
Given that spell damage gives double experience per hp drained, it's hard to compete with double cause light between rounds and sleeping around the tick, although it does require far more concentration than a (decently enchanted) halberd on aim lower -- which, while slower, allows you to simply spam "kill ***" in most of the good darkie leveling areas.
I do not believe that you get double xps for that damage. I believe you get the xps you would get normally and then a bonus for successfully casting the spell. Though with that being said, it is faster to level with getting spell damage. I think this is because spells tend to do more damage than weapon strikes. There's a whole lot of other stuff I could say about the way xps are gained on SK but I'm lazy and not prone to listing stuff.