So, I am on my 3rd life (2nd TR) and I just hit 15. Xp is coming in REALLY slow and I still have over a million left to hit 20.

I haven't touched Vale and most of Necro4 and the other higher level areas. I've milked GH and desert pretty well, though still doing slayers there.

Any suggestions on the best course to continue leveling? I'm open to suggestions as this has been a real grind because of my play times.

Thanks!