Board Thread:Questions and Answers/@comment-25769372-20150725040933/@comment-26140304-20150729025723

Here's how it works: This all makes it possible to solo Mecha Gods (Fire included, but that's a tough thing to do), Eriole and Tesla in Atharva, and some other challenges that aren't Curse and Paralysis heavy.
 * Quaid's Spirit Tiara takes effect when above 50% HP. This means that Quaid's Atk, Def, and Rec stats will receive a 75% boost. Additionally, Quaid's Extra Skill stacks with Spirit Tiara's effects.
 * With Quaid's Extra Skill active, his stats will always receive at least a 75% boost. When Quaid's HP reaches below 50%, Spirit Tiara's effect will disappear, but Quaid's Extra Skill will boost his stats by 75+% below the 50% HP threshold, which compensates for the lost effect of Spirit Tiara.
 * With a 75+% Def boost, Quaid is able to easily tank the Thunder Mecha God's attacks very well. With Quaid having elemental advantage and high Def, he will be taking 1 damage at least most of the time.
 * Fallacy Orb helps Quaid recover a sufficient amount of HP to the point where curing him is rather unnecessary.