To my knowledge, anything with am Imm xp requirement requires 2k imm xp. Yes, the easiest way to get that is role xp, but I've certainly gained it by other means as well. 1500 xp for my first batch of role entries seems pretty typical for me if I actually put a moderate amount of effort and creativity into it. That leaves 500 to go. Sometimes I meet that with a second entry. More typically, I have my character pursue a religion with an easy to interact with Imm, and get the 500 from one good interaction. Then I explore the crap out of lots of tough areas as early as possible, as well as some very easy areas with lots of stuff to see. And as soon as I'm high enough level to take the edge, I knock it down twice and never have enough points to choose another edge for the rest of my char's life.