Has anyone seen a guide for the best places to level?

I'm at lvl 32 right now and it seems like it's taking forever.

Also, is joining a solo xp party worth it? It takes me about twice as long to kill stuff when I solo in a 5 member party, but I'm not sure how much extra xp I'm getting

Finally, where are Occy and Abaddon? I've been through normal but I forget now that I'm in act 2 nightmare.

if i were u id just find some good shul runs and farm and inbetween runs go outa rift and kill random stuff. cant help much with rest accept occy=angel passage and abbadon= tower of london.
plus it helps a bit to kill things within 2 above and/or 2below ur level.

best experience in game is to find an area where the monsters are 3 levels higher than your combat, and where the monsters are easy for your build to kill (not all flying monsters if youre a guardian, etc)
and farm it solo in a 5person party

it goes VERY fast like that, up until level 48-49, then it slows down

Join a solo exp group and clear instances where the you kill the best (for example, i like the warehouse and sewer type instances for leveling sometimes because its easier to avoid being surrounded) and difference in level between you and the monsters is no more than + or - 3 levels. Adjust the +/- lvl difference to suit your killing ability - if its too hard to kill lvl 35 monsters in a 5 person game @ lvl 32 then try lvl 29 monsters and work your way up. As long as they are within 3 lvls of you supposedly theres no lvl penalty. Even better (and more fun) is to get a buddy and join a 3/5 pub and semi-solo exp - this is awesome for leveling while questing too.

occy: angel passage
abbadon: tower of london