Pretty sure 2:20 4th round is quite a lot faster than average, for Komachi. My guess is that you were both lucky!
Oh wait. I just found some notes I took a while ago (from the silly challenge iirc) and I have written that Eiki's timer is 2:30 in the fourth round. I'm sure I had a bunch of examples or I probably wouldn't have written that down, and it would be very unlike Komachi to win half a minute early in the first place, but you never know I guess.
And that reminds me that I was testing the PoDD timers as well. In the first round, the AI seems to consistently last until 1:40. The first hit exactly 1 minute in, then the next two after 20 second intervals. From what I've looked at so far (which isn't much) it only uses bombs if it gets trapped before enough time has passed for it to take one of the scheduled hits. Also, it seems that the second and third hits try to follow 20 seconds after, no matter what. So like, if it took the first hit late, at 1:20 for instance, the next two would be at 1:40 and 2:00. So it doesn't try to "correct" itself if it messes up, and one early hit shortens the whole match. (Theoretically. I never actually saw the AI take early hits. Only late ones.) I've also only looked at stage 1 so far, and only ten matches or so. There were some weird ones where it lasted over 2 minutes, but otherwise they ended at almost exactly 1:40. (With one unique case where it happened to have a full spell gauge and ended up hypering at 1:40, then dying as soon as it wore off. The only time I saw the AI hyper in the matches I looked at.) All played as Kana or Kotohime against random others.
I'm not really sure why I just suddenly posted this here since it's pretty well off topic and something almost nobody would care to read anyway, but what the hell.
Congrats L3PiK and Sakurei on the Lunatic clears.