While the game has been moderately fun, the balance (as of version 8.6) could use a serious rework. I'm really only able to get very far using Demon, Gladiator or very well-tailored Zombie or Fairy decks.
The other decks are unlocked too late into the game (especially with wagers enabled) to experiment with. Personally, at some point it would be nice to have at least some sandbox to experiment with deck-building, and to re-balance HP gain for all the gals at the much higher heights. It is almost ridiculous how much time some of these later battles take. Sometimes they can take literal hours. What decks are unlocked naturally by interacting with some gals, it is harder to unlock some of the other ones. One way I noticed was to have an ally as soon as possible who is always bigger than you, and to constantly roll the "Beg for Cards" option until you get cards from one of these more elusive decks.
I am debating how much time I've spent on this game and why after almost a year and a half the balance has not been updated for players who do not support on Patreon. I think we're a little overdue for an update.
However, reading one of the free posts on the Patreon suggests that this upcoming version will be the final version. I would hope that with this final release there would be some rewards for players who are able to finish the story at least once, or at the very least a sandbox to experiment with deck-building, as previously mentioned.