I was reading that you need to finish all the main line quests to get into Ishgard when the expansion comes out. There's a few dungeons that are required as you level up to complete quests. My character is level 43 so I'm thinking the only two level 50 dungeons I have left that will be "required" as part of the quest line are Castrum Meridianum and The Praetorium.

Are any of the others needed to progress to the end of the 2.5.5 quest line?

I'm going to try to do as many as I can to get geared up but was curious about this aspect of the progression requirements.