I am bot-grinding 5 characters (1 of each class). I have all but 1 at level 42 now. Here is my advice if you want to bot them. You will need a friend or another account to quickly warp you to the necessary checkpoints/quest-parts at each stage;
1-12: Queen profile (
http://www.thebuddyforum.com/demonb...ofiles/54316-act1-lvl-2-14-queen-running.html)
- @ level 12, gear up on AH with level 12 stuff - go for prime stat as high as you can with some vitality, highest DPS 1-handed weapon (or 2 handed for demon-hunter as can still quiver with 2-hander), limit of 2k gold per item is fine at this stage -
12-20: Highland Passage (
http://www.thebuddyforum.com/demonb...s/54665-act1-lvl-12-18-highlands-passage.html)
- @ level 20, gear up on AH again with level 20 stuff (I got some level 21 stuff too and kept level 12 stuff in a few slots til I hit 21 to put them on) - vitality is more important now, so go for highest prime stat with good vitality and a high DPS again, limit of 10k-15k per item more than enough -
20-35: Core of Arreat, if set to normal (
http://www.thebuddyforum.com/demonb...lly-afk-working-core-arreat-a3-nightmare.html)
- @ level 35, gear up on AH again with level 35 stuff - always the same, highest prime stat with good vitality, and highest DPS available - a limit of 15-20k gold per item is more than enough -
35-42: Highland Passage (
http://www.thebuddyforum.com/demonb...s/54665-act1-lvl-12-18-highlands-passage.html) on nightmare mode
- @ level 42, gear up on AH again - 20k per item should still be plenty
42-???: Core of Arreat, now on nightmare mode (
http://www.thebuddyforum.com/demonb...lly-afk-working-core-arreat-a3-nightmare.html)
(I suspect Core of Arreat on nightmare MAY take you to 60, but might involve doing Highland passage on hell-mode for some levels, I don't know yet)
Note: Whenever you have multiple items for any slot on the AH that all seem decent, look for any with a +experience bonus, they do help!
Be sure to look on the later pages of the Highland passage thread for my own .xml files which improve the weaypoints and quest-completion a bit better.