Balance is and always was a nightmare :/
I prefer games harder myself, and found the game originally to be too easy when i playtested it.
So I tweaked things here and there and probably overcompensated.
When I do come back to this (Eventuallllly) I'll do some additional re-balancing on damage + hp pools to hopefully make it manageable without having to dump a bunch of height into cards from the get go.