User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-99.170.116.67-20150118015721/@comment-16281343-20150118043912

"If it’s the current Ise-kun, then you will be comparable to Mr. Raiser Phoenix even at his full power. No, most likely you can beat him."

- Kiba

That's before the major power ups.