Just a few cards for now since I don't know how much you care about difficulty.

I'll probably miss certain balancing aspects which are present in vanilla too, like how Seeing Red is worse than Adrenaline because Chad has Exhaust synergy, so the result is that my suggestions will be more in line with vanilla numbers in a vacuum.

In the first place, this mod is intrinsically easy because you have a massive health pool and an overtuned starter relic, which you clearly recognized so you made Strike+ and Defend+ worse, but all this can be tweaked later.

Apropos, it'd be helpful if the starter relic didn't hide upgraded cards when making the choice of which to upgrade, but idk if it's feasible to change Armament's code.


Note:
I'll refer to "Increase card's damage and Block" with "Sharpen" again to save space.

Bloodcraft

Aluzard: See Metallicize. The downside is that you play this each turn and it might clog your hand, but it fuels the Exhaust pile and is not a Power, so at most: "Gain 2 Block. Sharpen / Enchant / etc. a card by 1." Upgrade is fine, but if you decide to return Aluzard+ each turn, try "3 Block" or "Sharpen by 2".

Armored Bat: See Dash, Carnage, Protect. At most: "Gain 7 Block." or nerf Droids to 1/1. Upgrade is fine, but if you nerf Droids, Bat+ could upgrade the 3 Droids to 2/2.

Autoblade: See Twin Strike. Depends on how many Machina cards are in the pool and how easy it is to generate Droids. I'd start at "10 damage + 2 for each other Machina card in hand." Upgrade could be "14 damage" or "+5 for each" or a mix of both.