Spam leves - rested exp + food + manual + sweat of brow (only have sweat of brow set and nothing else) it doesnt proc a lot but when it does OMG! also stack output so you have more hits per node.

From what I remember is the faster you do the leve you get a speed bonus as well so dont bother mining other nodes while you are on a leve, waste of time if you are trying to level faster. Do it fast and get speed bonus.

Also the best leves if i remember when i did it was in Grid until 40 and then off to uldah to get halatali leves