The Followers system (NPC companions like the FF14 Duty Support system) let me learn the dungeon at my own pace before jumping into Heroic difficulty, and it helps SO MUCH.

Back to the Dawnbreaker dungeon: There's a boss you fight on an airship who does a huge instakill bubble that swallows the whole thing, and you have to MOUNT UP AND FLY OUT OF IT to survive, and then you swoop back in to continue fighting her. Just cool as heck