Talk:Mercenaries/@comment-33027141-20180624220253/@comment-28173866-20180630093607

It's not, because it is very situational. Depending on the alternative spell, you need at least a 3 crit or higher double attack or a triple ( with 2 crit) attack for it to be useful. For example, if you use a Green dragon shield against a 3 crit double attack, you end up with effectively 2 damage. If you use Drago Trap, you will receive 2 damage, too, but you can't use it against single attacks. With Deity Green Dragon Shield you will even receive no damage at all.