The initial build of the deck was as shown in the picture, on day 8 when it got down to 1HP, I added 6 SoDs and thrown out the CPs.
It had double draw, max upgrades, 2x mark initially and 170HP, but later I changed to max health instead of 2x mark when its HP was dropping too low.
First few days it went 41:1, then reached rank #1 on day 6 with 52:2, its rating peaked at 558 on day 8 with 63:2 win/loss ratio. Took down on day 9, it was still #1 in the morning (see attached snapshot), but dropped to #2 by now.