Board Thread:General Discussion/@comment-138.51.201.234-20140628201421/@comment-25036392-20140628215958

That's all up to you.

In my honest opinion, maxing the attack and defense is more important (Only if it's a strong card you will use, that is) because it makes your team much stronger. Though, buying all those arcanas is very expensive.

So I'd say it'd be better if you max the skill before you max the attack, as this is much cheaper than maxing a card's stats.

If you do have lots of medals, then it's really up to you.