Almost at an end for DAI

Im 113 hours in at level 22. Guessing by how everyone is talking, the main story is about to end. I still have stuff do though. For instance, I still have a lot of war table operations, I have the dlcs, but as I was going through The Descent I could only get through the second floor, almost dying at the end of it. I also have 4 more dragons to slay. But they all are higher level and ik im going to get my butt beat. Anything I should do before moving onto my last main quest?