User blog comment:B214/Talk About What You Want! 3/@comment-99.101.204.248-20141127062737/@comment-16281343-20141127063827

He is way up the charts but not entirely because of the mutation pieces. Issei's Mutation pieces represents Triaina and True Queen.

Having a mutation piece doesn't increase someone's power. It only gives the King more room to work with in choosing a person to reincarnate someone.