I think I built a new counter vs Octane with no upped cards.
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4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4t7 4t7 4t7 4t7 4t7 4t7 592 592 592 5c4 5c4 5c4 5c4 5c4 5c4 5c5 5c5 5rk 5rk 5rk 5rk 5rk 5rk 8pn
Get out a shield ASAP, and don't play shards unless you can enchant them or need the health badly. Once you have a shield up and some shards protected, it should be smooth sailing from there. Enchant a staff if you want as well. Octane only has 4 explosions, so if you count them, you can even have him waste them all on your towers. Octane has 8 animate weapons, and there's 6 RT in this deck. That means at most, he's limited to 21 (18 with shield) damage per turn. That means with 4-5 healing items, you should recover health with no problem. This is obviously a very unrefined build, but someone should see if this path can be gone down.