The most recent run I did on my hunter, I never set foot in Ghostlands, nor did I need to fully complete Dustwallow Marsh. There are a LOT of quest lines in each of these zones that might not be available unless you progress and complete story-line quests in order. Northern Barrens and Andorhal are especially bad in this regard, but many zones you can easily miss out on a lot of quests if you don't do a vital quest. So make sure you keep an eye on the minimap for quest ! indicators.
Level with a pet if you can because it will help keep you safe. If your pet is tanking all of the damage from the enemies you’re fighting, you won’t have to. The other reason is that pets are easier and cheaper to heal than you are. If you don’t have a pet, make sure you know how to use your defensive abilities. You can’t level quickly if you are dying all the time.
The Horde levels 50-60 guide has been rewritten and revamped. My 1-60 Horde leveling guide is now completely updated for the 1.12 Drums of War patch. As you can see it is about 15% larger than the 40-50 guide (single largest guide page yet). There is also a lot of route changes. I moved the entire Silithus section from level 55 to level 58, which allowed me to include a lot more quests for that zone. There is also a lot of other improvement to the route, including adding a lot more quests into the guide, mostly from Moonglade, Silithus and Eastern Plaguelands. This will make the final level 59 grind much shorter.
Ravager – Ravager replaces Bladestorm and does about an Execute amount of damage less than Bladestorm. That may seem like a lot. However, one thing people forget is while Ravager is active you get to use other spells at the same time. Where as with Bladestorm all you can do is Bladestorm. So, while Ravager is active you can turn on Sweeping Strikes and use a Colossus Smash, Mortal Strike, and Execute by the time your Bladestorm would have ended. In the end, you will do thousands of damage more.
If you have a lot of gold, you can use it to pay other players to do some of the game’s less exciting activities, like fishing, herbing and mining. Some high-end guilds like to amass large stashes of gold so that they can provide consumable crafted items like stat-enhancing alchemy flasks and cooked food items that buff players, as well as enchantments and gems, to their raiders.
Possible solutions: nerf dungeon experience unless there are five people in the group. Drastically nerf experience if there's a high level character along. More importantly, fix the pacing of outdoor content so that people won't get frustrated and turn to cheesy methods like this -- even hardcore, Mythic-raiding, altaholic Day-1 Warcraft players like myself.