UPDATE: I reached a point where leveling up Shanna/Thany and Tate was more trouble than it was worth, and I've been using Shin alot. So I'll be taking the Sacae path. But I would like to make a separate save along the other chapter 17-20 path even if I have to use cheats or download a save file, just so I can see what the other path is like after I finish the Sacae path. I've learned from experience that using the XP codebreaker cheat to hyper-level doesn't take me to the other chapter 17 path.