Recommended Zone Order Progression
Written up by MiltonSlavemasta, post is at http://forums.somethingawful.com/showthread.php?threadid=3457973&userid=0&perpage=40&pagenumber=252#post424875935
Edit: I've wanted to clarify some things since I originally posted this; Some areas are especially obnoxious or totally unnecessary, so I am going to try and identify areas you might want to seriously consider ignoring completely with an asterisk. Four previously unmentioned areas have been included.
1. Trollmire 1->3
2. Norgos' Lair
3. Derth (Talk to the Shady Man in the North)
- Dwarves do The Deep Bellow now
6. Trollmire 4
9. Golem Graveyard*(Minor loot, few enemies, real purpose is in postgame)
10. The Maze (If Alt Maze, Do 1-3 and come back later)
11. Old Forest (If Alt Old Forest, come back after Sandworm or Daikara)
12. Sandworm Lair
13. Daikara
- I usually go back and enter Temporal Rift after a few more dungeons.
14. Hidden Compound*(Mainly for story unlock, I skip this most games)
15. Ruined Halfling Complex*(Long, dangerous, can be boring. Has a story unlock)
You can wander around up north to rescue the Merchant.
16. Lake of Nur (Reached through Old Forest)
17. Tempest Peak*(Unimportant for non-Antimagic characters)
- If the Caldera spawns, this is when I do it.
18. Ruined Dungeon
19. You can try Mark of the Spellblaze if you want, I save it until after Dreadfell*(Few rewards for antimagic characters)
20. Dreadfell (You can save vaults for later, I usually open them all)
- At level 24, you can hear screams and enter into Dark Crypt. It is dangerous and has middling rewards, but is necessary for one prodigy.
- This is also a good time to do Last Hope Graveyard if you want to do it. It isn't important except for one class unlock.
21. Mark of the Spellblaze if you didn't do it yet. Some characters might still skip it.
22. Reknor
23. Finish the place where you teleport, go to the town to get the Spider quest from a lady in the mid-north
24. Ardhungol
25. Temple of Creation (Wander around near the coast to find this)
26. Backdoor to Vor Armoury (NOT Vor Pride)
27. Go back to town to get the location of Briagh's Lair, then finish it.
28. Go back east and fight backup guardians in Trollmire, Kor'Pul, Reknor, Scintillating Caves, The Maze, Dreadfell, Daikara, Sandworm Lair, and Old Forest. Dwarves get an extra one in The Deep Bellow.
29. Elven ruins. (This can be done much earlier, but it is risky.)
- If Sludgenest spawns, this is roughly when I do it.
30. Tannen's Quest (Ask around Last Hope to unlock this)
- Can do Valley of the Moon if you get the quest
31. Gorbat Pride
32. Grushnak Pride
33. Eruan
34. Vor Pride
35. Rak'Shor Pride
36. Slime Tunnels(Note: You don't have to kill everything here.)
37. High Peak
WIN
38. Return to Golem Graveyard.
39. Kill All Wizards.