I just came back to the game after being gone for 5 years. I'm a level 110 brigand and I want to get to Luclin. It seems all the paths are blocked to me. Am I missing something?
Take a look at the wiki page for the Blood of Luclin Timeline. It shows the main quests of Luclin and the pre-requisites. If you have already done the pre-requisites, any wizard spire can take you to The Blinding.