There exists an unfinished TAS, which was somewhat hard to find, so I'm making a post here to make it more accessible to non-Japanese speakers.

I believe it has imperfect strategy, especially regarding not picking up the 2 Bomb cards from Bomber Wall, which makes the Phoenix fight 2 turns longer. Regardless it has interesting card pickups for Golem and Bebuzzu 2, which I want to look into. It's also interesting to see the limits of some minigames and battles.

It was originally posted on nicovideo in 3 parts:

www.nicovideo.jp/watch/sm21220042

www.nicovideo.jp/watch/sm21281668

www.nicovideo.jp/watch/sm21361601

A reupload that coalesces them into one on YouTube also exists:

PS.: I do plan to come back and get WR on this game, but the difficulty of Bomber Wall on emulator and the inaccessibility of DS capturing methods is making it tough :(

I remember seeing this a long time ago, while I was doing research before I even started running the game. I wouldn't draw any conclusions about theoretical limits on minigames and microgames from this TAS, personally (my best time on Race to the Top is 18.41s, which is 0.33s faster than what's shown in this video). Like you said, the TAS doesn't do Bomber Wall, which a TAS would be really fast at, it doesn't get Bluebay for the warp... maybe I dismissed it unfairly because it seemed pretty suboptimal, but it did look like an early WIP to me. Perhaps you'll find some nuggets that help out where I didn't, though.