You don't need any specific deck to reach master 1. This is not a KC Cup. No demotion after losing and you will be promoted after getting a fix amount of wins. Even trash decks can get you to the top, all you need is to accumulate 40 wins in total.
It goes back to Konami for still promoting this 🔥 event every single time knowing clearly of all problems. End this event and keep the meta to ranked only and problem solved.