I have a level 15 Marauder at Aleport working on my Hunter Log (completed level 19 mobs), Leve quests, and Fates. I have outleveled Aleport and do not know where the next quest hub is located for my level.

When should I travel to Ul’Dah to start leveling Gladiator? How do I travel to Ul’Dah to join the Gladiator guild? Also, are they must have cross-class abilities for the Marauder/Warrior for leveling and end-game?