IMO, I think you should go with Playoff Normal for this match.
Given that you only lost by 3 points while on the road, HCA surely was the deciding factor the last time you played Kazuki.
Even though you won't have HCA if you advance to the finals, both of your possible opponents already used Playoff Crunch Time so they could get to the semifinals, if you maintain a high enthusiasm from now until the finals you will improve your chances of winning the championship.