This is a deck I created to auto-duel L45 standard duelists to win quickly and hopefully get 2-4 chests. Did a lot of tweaking over a couple of days when I'd lose a duel and this is the end result with what cards I have available. BC would be a lot better than SOrb.
Deck:
1x Sphere Kuriboh
3x Des Kangaroo
3x Big Koala
3x The Earth - Hex-Sealed Fusion
2x The Dark - Hex-Sealed Fusion
1x Riryoku
1x Fusion Sage
1x Super Rush Headlong
3x Polymerization
2x Security Orb
Extra Deck:
Master of Oz
Video of the deck in action:
https://www.youtube.com/watch?v=dDlzzeDlssQ
Note:
I did swap out the third Koala for B.E.S. Big Core basically for an easy tribute and protection while I get the fusion together.
I also pulled 3 fusions and 3 koalas after the video so I felt I needed an easy tribute that could survive a couple turns.
Believe me or not, I just faced a SD that used a similar version of this deck, called "The World of OZ".
He had 3x Skelengel and 3x Master of OZ. I'm at Stage 48 so my SDs should be lvl 45.