The Horde 12-20 (Barrens + Stonetalon Mountains) guide has been rewritten and revamped. In addition, there has been numerous tweaks to the speedrun route to make things faster and easier to follow. Also, in case you haven't noticed I am now adding about 40% more info per step and redoing all the images. Unlike with my previous vanilla guides, I am now giving a brief explanation of where to go and what to do with each step along with any other helpful tips.
Although WoW currency can be found through quests, fallen enemies or the dreaded "farming" process, doing it the conventional way is time-consuming. Considering the upcoming release of the Legion expansion pack in August of 2016, stocking up on gold is more important than ever. This way, you can spend less time farming and more time buying everything you need to tackle the next set of challenges.
Learn only the Essential Skills - Learning new and upgraded Skills gets very expensive very quickly (Buying a single skill that requires level 30 will cost you 1 Gold, and a single level 40 Skill costs 2 Gold) If you buy just the essentials, you can save anywhere from 15 to 30 gold before level 40, depending on your Class. Generally, higher ranks of skills that are used for their utility effects can be skipped (these include Warrior's Harmstring, Rogue's Gouge and Kick, Mage's Frost Nova, and many other CC and utility skills and abilities). Also, don't buy any ranks of abilities that you will not use during leveling (things like Rogue's Expose Armor, Hunter's Eyes of the Beast, Warlock's Eye of Kilrogg, and so on).
Cold Eye Basilisks (marked RED on the map) - Western shoreline of the middle Stranglethorn Vale is infested with deadly Basilisks. These monsters are a good source of Heavy Leather and Thick Leather (we recommend Skinning for this spot), they also drop a lot of Vendor Trash Items (Curved Basilisk Claw, Intact Basilisk Spine, Large Basilisk Tail, and Squishy Basilisk Eye), Large Fangs (used in Leatherworking, Blacksmithing, and Alchemy Recipes), Wicked Claws (used in Leatherworking and Blacksmithing Recipes), 12 Slot Bags, and most importantly, Cold Eye Basilisks have a small chance to drop the Cold Basilisk Eye (a level 35 BoE Trinket, that can be very valuable, because useful Trinkets are rare in Classic). Recommended Level - 38+.
Even though the guide was developed with a hunter, the guide can be followed by any class. Except you have to do your class's quests which aren't a whole lot. I do have full intention to make my guide friendly with all classes in the future by listing all of their steps as well. There will be a toggle that allows you to show which class's steps you want to see in the guide. But this is coming later.
Whelgar's Excavation Site - This Dwarven excavation site was overrun by Raptors (Mottled Scythemaws and Mottled Razormaws). These reptiles are a great source of Medium Leather (you should have Skinning Profession if you want to farm here, as a very large portion of income that comes from this spot is acquired by Skinning Raptors). They also drop some Vendor Trash Items and Raptor Eggs (these are convenient, as a Cooking Recipe for them comes from a Quest that is located just above the Site) that can be used for Leveling up Cooking Skill. However, the best part about this spot is that both Raptor types present here drop level 19 Twink Gear (Feet of the Lynx, Sentry Cloak, Redbeard Crest, and Twisted Chanter's Staff) that will achieve astronomical prices at the later stages of the Game (drop rates are very low, so some RNG is involved, sadly). Recommended Level - 25+.