When you start upgrading, start with the hourglasses. They're much more efficient upgraded.
I have enough to upgrade 4 cards right now. I have also resorted to farming AI3 for the moment. The Arena is really annoying me. I have made some changes:
v1.1-
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4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4vf 52h 55o 55r 55r 55r 593 593 593 596 596 596 5bt 5f2 5f6 5f6 5f6 5id 5la 5op 5rl 5rl 5rl 5rl 5ul 5up 5up 5up 61t 61t 61t 61t 61t 61t 8pu
Are you using that deck to farm AI3? Because that looks way too clunky and slow.
Also, I don't know about otys. Why use unupped otys for control? Not many creatures have hp below 3.
If you wanna keep otys, up them. Unupped otys aren't that great. Hourglasses would be another really great upgrade.