User blog comment:B214/Question and Answers 6/@comment-29255052-20180310044601/@comment-24595619-20180310051351

You also have to consider that Kuroka isn't a physical combatant.

Kuroka is a Wizard and Support-Type, while Issei is a straight Power-Type (with Boosted Gear Gift making him somewhat of a Support-Type, but not by much).