For example, I don't have Nightfall and the elite skill Searing Flames is in Eye of the North. Can I cap it?
I'm guessing no, but then that's really retarded. I mean, you buy the game only to be told you're not allowed to cap some of the Elites! Don't put them in the game if you can't cap them. Make new elites!
Hope you can shed some light on the subject.
