Emulator used: BizHawk 2.9.1, Gambatte core
I got frustrated with doing the RNG grind for this game in Retro Achievements for the moment. Like, frustrated enough to get the idea of seeing what a potential "all gold medals" TAS could be. Turns out a lot of waiting for RNG medal drops. As Silver medals require 2 Bronze medals and Gold medals require 2 Silver medals for each monster in the game, the actual odds for a Gold medal in a reasonable time is dire.
At least this proof of concept does have a certain party in mind to get through this. A Hero with a personality with a good strength, agility, and intelligence growth, and three mages with two of them having a personality for good agility and intelligence growth. I went with the sexy personality for the Hero as that provides great stat growths across the board and Smart for the two recruited mages for the agility and intelligence. The one already in the tavern is ordinary, which isn't the biggest dealbreaker since it's just base stat growth. Ultimately the plan is to do the Pachisi level up bug for all the main party members to 99 quickly. I might route in changing one of the mages into a sage for better weapon choices but that's definitely pending.