Yea Kazuma has become very powerful indeed but I still like Ryuho's final stage abit better. Oh and if you want to see how strong they have really become make sure you don't miss episode 26. That when Kazuma and Ryuho have their match to see whos more powerful. trust me it's the best.
I know love because I know hate, I know joy because I know sorrow, I know pleasure because I know pain, I know the value of life because I know death all to well.
"There is no shame in Love or Friendship even those of Light and Darkness know this."