Quote Originally Posted by miguelsalvador81 View Post
But if I have a weapon from another Element that has double the attack value, Even with that is better a same element weapon for a secondary slot?
That depends on the skill levels, and your overall power. If the on-element weapon with less Atk has been skill leveled up, then yes, it'll be much better.

For the record, I've made a damage calc for this, but it's probably a bit too much for a new player.