User blog comment:B214/Question and Answers 6/@comment-26293136-20161015001353/@comment-134.115.2.116-20161015055635

I'd say ultimate-class. Not only he has mastered his Longinus' Balance Breaker, prior to his perfection, he is the one of few person who can force Vali to use Juggernaut Drive (and Vali without Juggernaut Drive is already on par with ultimate-class devil).