So there exists a TAS for this at 1:55:38. I don't believe it'd be RTA viable. It is played emulating GBC (there are some console differences).

http://www.nicovideo.jp/mylist/35608483

The main thing it does is fairly early (after Land Dragon) crafting of best possible weapons is done for Ashton and Celine, and crafting of the Field Actions of Run & Hover for Precis. I don't think it'd be possible to RTA to craft the weapons, it's done in a few steps, and the last step would be too hard to do at that low level. Additionally, there is some manipulation of getting rare drops from monsters.

I DO think it's RTA viable to craft the FA for Precis to Run/Hover. This allows us to not have to dump 1500 sp onto Celine so she learns hover (done after Aspara). And get's us hover a little earlier.

All in all, unless there exists reliable RNG manip for some of the things used many things in the TAS, I don't think I can adopt much. But I am going to some experimentation to see what I can get out of this.