May I add my opinion.
For me, the raw physical/magic attack boost should be 5 times stronger while elemental property attack should be 5 to 7. Elemental property ignores defense while adding damaged only increasing/decreasing based on the enemy element.
They should also boost the 330 dungeon card. +5 Healing is pretty weak, maybe 10-20 per star. We don’t have much healing stat itens except SPR Heavy gear and we do lose quite a lot of defense to use them. If they were boosted, I would gladly remove my Nuaele and equip them.
For the defense cards, maybe a % to reduce a type of damage would be better like - x% slash damage instead of raw stat. It would give us better options than going for either Nuaele or Zaura while using Armaos for Budget builds.