I add TSM as a bonus because it is not as straightforward as the previously listed add-ons and I am not the best to explain it. The grind can be tough, but AAP helps to get the things that slow you down out of the way.
It works from level 20 all the way to 120, so perfect for those wanting to get Heritage Armor for allied races. Azeroth Autopilot is essential for speed leveling your alts.
