Absolutely glacial pacing. The duel started in the latter half of chapter 12, and if it's finally ending here, that's ~28% of the manga thus far spent on one fight.
Damn, that's hard to recover from if you want readers to stay invested.
YEP. I have to remind myself with these that i am NOT the target audience, at the same time if you want to be a better writer read more. I guess you can say i am trying to find my story out of all of this.