Well my priest is roughly lvl 90, I soloed most, pretty much until lvl 78 and then 2 or 3 lvls after that, and I'm close to 20k kills. Lvled using holy fire on zombies, then on necrozen, then I stayed at stryge for a while, jumping all the way to skeles/wolfs, as soon as I got lvl 30 I soloed in ice...