I'm pretty sure Kazekoshi's strategy was to use their best at first so she can get a monster lead from less skilled players and then have the other players play defensively and keep the lead...
Unfortunately Kaori is mega lucky, they didn't know about Hisa until to late and were poorly prepared for her and they thought Kana could survive Koromo however the last time they faced her it wasn't a full moon and so she's way stronger now.
EDIT: Wow I keep replying at the same time as other people... what's up with that...
