Notes & Combos
The climb in Master was actually pretty smooth, except for the transition from Master 2 to Master 1, where I was one game away from demoting about five times.
I added the new Dominus Purge during a demotion game in Master 2 and then won six out of seven games to reach Master 1.
As for the extra deck during the Master climb, I never used Black Rose Moonlight Dragon or Cosmic Blazar Dragon, and Ty-Phon was rarely used as well. All the other cards were really important.