I do not recommend going for TBC, although I remember Hellfire peninsula to be decent, everything else is rather slow. Instead go for WotLK, Borean Thundra gets you levelled very fast, and then you can head straight for Icecrown at 67, which is also insanely fast, although admittedly has a few elite quests. You can go to Sholazar Basin alternatively. 2 zones should get you 60-80 no problem.
“We are seeing the same sort of discrepancies that folks in this thread and others have pointed out,” said Hazzikostas. “But we still have yet to pinpoint the exact aspect of scaling that we failed to account for. We want to understand why the numbers are off and fix the underlying cause: Were stats on gear reduced too much? Some aspect of creature armor or other combat calculations? Are our baseline values accurate, but the shape of the scaling curve wrong such that it’s particularly far off the mark in the 60-80 range?

For future reference, it is a great option to purchase mounts and pets as a long-term investment. Not only do their prices scale well even when a new expansion drops, but there is always a demand for them. The only drawback to this strategy is you would need a hefty amount of initial wow gold investment and also maybe have to go through the motions of spending for a guild bank.
For scribes who can't and won't go all in with crafting Darkmoon Cards, an attractive alternative is to also dip into the other "odds and ends" inscription items. Particularly popular and profitable are BoE shoulder enchants (both blue and purple rarity), Runescrolls of Fortitude and the pair of companion kites. And if players had to choose only one of these, BoE should enchants are "easily one of the best money makers, in terms of gold per hour" because of their consistent demand and persistently solid wow gold price

Some quests in my guide are marked as "SKIP" and colored in red.  These quests are simply either too hard to solo or not worth the XP/time and are skipped.  My guide will only list SKIPPED quests if the quest is a direct follow up after completing a quest, not one that you have to click the NPC again to get it.  If you hover over the skipped quests, it will give info on why it is skipped in the guide (unless that info is already listed directly in the guide text).
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