I'm just starting out, but for me, I go with this:
1. Critical damage
2. Critical rate (if you are not maxed)
3. Damage
4. ATK
5. Ignore Defense (If you're less than 94-96%, then up this)
6. Arcane Force (Optional, it's so that I can clear out VJ and chu-chu more easily)
7. DEX stat
8. Boss...