Here's my guide for leveling.
EDIT: I play melees, so this might not work for archers and mages. Also, I usually don't use buff bots until level 30-40, so most of this guide is for people not getting buffs.
New arrivals, level 1-15When you first arrive, doing all the starter quests for holt, shoushi, and yaraq will get you to level 13 or 14. You could also hunt outside till level 9 or so, then camp one of the Sword of lost light key dungeons.
Healers in the 4 starter towns sell up to level 4 attribute buffs, and there are lugian gem sellers in Holt, shoushi, and yaraq that sell level 3 protection gems. These are very helpful. I also recommend getting the explorer armor/jewely.
Level 10+Head to the Green mire grave near Shoushi (27.8s, 71.6e) and stay there till you can take on the final room with the shamans and chief.
Visit Tibri's Cave and help her fight the banderlings and rats (24.2n, 43.2e).
level 15+Head to the Hills citadel, the lugian citadel near Lin (56.5s, 67e). Stay here until you can take on the huge swarms on Gigas and lithos without trouble (level 20-25).
Go to the olthoi arcade, and fight whatever olthoi you do well against.
Head to the abandoned village west of shoushi (33.9s, 64.9e) and kill the lugians there. For more creatures, head south of this village to some empyrean ruins, where you will find rats, zefirs, and skeletons.
level 20+Hunt on the beaches of eastham. avoid the stronger creatures.Try to fight the moarsmen, golems, skeletons, and some of the undead and mosswarts. Avoid gold wasps and shallows sharks.
Hunt the arwic mines, fighting the drudge lurkers and stalkers, the rats, and the banderlings. Avoid the wasps.
Fight mosswarts at Fort Aimaru (34.2s, 80.7e)
Fight mosswarts at Saadia's Retreat (53.6s, 76.6e)
level 25+Head to the Lair of Death north of Arwic (42n 58.1e) and fight the olthoi. Once this dungeon becomes easy, head to the deeper catacombs portal in the deepest part of the lair.
Battle the mites in their cave the Mite Maze (41.2n, 57.3e). Avoid the gold wasps until you are stronger.
Roam the country side (the orange on the
turbine map)
level 35+Hunt olthoi in the olthoi soldier's nest on the plateau of Marae Lassel
level 40+Fight the drudge raveners in the Dungeon Nye (6.2n, 34.4e)
Fight Montok Gotrok in the Old Mine, which you can access from a portal in the arwic mines
Fight the drudge raveners at the hilltop tower south of Holtburg (32.7n, 34.7e)
Slay the legionary olthoi in the ancient Empyrean Grotto (52.6n, 73.1w)
level 45+Head to plateau Village, and fight the monouga in the inner dungeon (43.5n, 43.4w)
level 50+Fight The olthoi in the lair of the Eviscerators (53.7n, 76.6w)
Kill white phyntos wasp in the Phyntos menace
level 60+Head to the Pit near Stonehold (64.3n, 23.4w) and fight the monouga
Head to the Sclavus Temple (82.5s, 75w) and fight the sclavus lords
Fight Fuin in Abayar's Laboratory.