Welcome to my Set Dungeons Build Guides and Videos!
You can find general information and Set Dungeon guides for the other classes at my Set Dungeon Thread.
This thread lists the builds for each Monk Set Dungeon and associated Mastery requirements, and each build has an attached Video of the Mastery clear. I found most of these Set Dungeons to be of easy to average difficulty, with the abundance of left over gear from last season/patch Monk meta helping out a great deal. I found I could recycle a lot of my monk build concepts between the Sets, mainly consisting of stacking as much Cooldown Reduction, Spirit Generation and Resource Cost Reduction as possible.
Difficulty - Hardest to Easiest based on my own experiences (your own attempts may vary!)
If you have any questions, feel free to comment here or in the build guides themselves.
I was requested by people to recommend the easiest Set Dungeons to do, especially for the Seasonal Journey, so I've gone through each of the classes and ranked them based on my own personal experience. Note that depending on how comfortable you are with the class and set, as well as gear and RNG in the Set Dungeons, your experiences may vary!
OP said I should freely add my videos to the bunch (I mastered all set dungeons), so for any of you interested in seeing another view on how to solve the set dungeons look at my contribution. Short explanations in video descriptions itself.