Awesome! It sure does add an extra layer of challenge. The balance may need tweaking though, so interested to know what you think after we fix the bug! :)
I've finished a couple of runs with the defensive deck on the mystic, and it feels really solid. I'm still getting used to drawing the extra patterns and making effective use of them, but it felt easier to win using the defensive deck on normal than to beat the first boss (and I tried 3 different options) on easy with the low nodes deck.
I'm not certain how much of this is an actual balance issue, and how much is just that this game is harder on a touchpad, though xD