I've been playing PoE for a few weeks now, I'm currently Level 59 (Duelist). I'm not doing any "league" stuff (no idea what that is) just soloing the story. As of 3.0 they changed the levelling all around, and I seem to be stuck. I'm going into "level 44" zones, which should be cake, and getting totally mauled by mobs that give virtually no exp. Those stupid long arm things that spawn the fire totems are a mess, and the bosses are nuts. I blew away 35% of my to-level exp, down to 0, just fighting the first boss after getting sent back to the "2.0" starter town.
Is this them subtly telling me I should start trying to party?
Post your tree and build? Lvl 59 should be smashing everything in the A5-A6 areas.