Threw these together at our local makerspace the other day. Our hero's were losing track of where all their cards were by the end of the campaign. First image is what all 4 hero's looked like at the end, 2nd pic is just filled out for completeness. We started using strain tokens to mark card exhaustion, flipping them took much real estate and rearranging of the play area, so I kept with that and put a spot for a strain token on each card, and 2 on the main card for once per activation abilities.