Your default choice should be Posthaste , as it will make you much better at covering long distances on a regular basis. You can use Farstrider if you never have to move more than the distance a single Posthaste will take you. Trailblazer is only really worth using for non-mounted periods where you will be moving between combat zones for a long time. Since dungeons have nearly constant combat, and World Quests allow you to mount up, there are not many places where you can reliably do this. There is a conceivably use for it for Survival in dungeons, since the spec does not have a lot of mobility when running between packs besides its Harpoon ability.