Pick one:
1. sit in queue for 5 hours
2. dungeon will go fast since you're doing content over a year old

I'm sure that you didn't think this too far through, and if it did happen, you'd be back here saying how terrible the queue times are. All story content is faceroll easy, because it's storymode encounters that is designed to be done in at most a few attempts assuming you have enough manual dexterity to tie your own shoelaces.