I had previously used a deck from here called Icaria Blue but kept getting frustrated with power instability. So using what I had already crafted/collected this is what I built and ran to get my first masters rank. I just started doing 9 wins a day and fell into masters without really trying.
Yes, I know: no merchants, 5 too many cards, singles, etc. I like playing with a bit of randomness to my decks and I am personally boycotting markets.