Are there any common mistakes new players make when managing their Comic Cards?

Common mistakes include using valuable cards as fodder for upgrading, not prioritizing core stats like Cooldown Duration and Ignore Defense early on, attempting to upgrade too many low-quality cards instead of focusing on a core set, not understanding the reroll mechanics and wasting gold on suboptimal rolls, and neglecting the 'Card Collection' bonuses. New players should aim for a solid set of 5-6 cards with balanced main stats before heavily investing in Premium Cards or perfect rerolls.