It's not perfect, but it's not a nothing solution either. I just hope someone else figures out how to fully fix the issue
I've been experimenting a LOT and I found the leak that is caused from auto saving. It relieves a lot of the pressure, but it can still crash. I am in the middle of testing it on lower settings, but it took about an hour to crash on higher settings. If someone else can pick it up where I left off, that would be great. I am pretty tired of trying and I got this to where it's playable. I just cannot find how to lower the committed RAM. It seems to go up when going to new areas and hoarding the shaders etc. Obviously you have to change NAME to your user name.
1: Delete your config folder in your "C:\Users\NAME\AppData\Roaming\eden" (you could just delete the entire eden folder to be sure everything is clean)
2: If you decide to delete the entire eden folder, make sure you grab your saves from "C:\Users\NAME\AppData\Roaming\eden\nand\user\save"
3: Not certain this affects the leak but to be sure, just delete the shader folder as well, it gets recreated.
4: The big reason for the leak, the part that fixes the autosave leak. "C:\Users\NAME\AppData\Roaming\eden\cache\game_list" delete all the files in here when you start eden. These are produced when you start the emulator, so it has to be done every time. When these are here, the autosave creates 100-200mbs of committed RAM every single time it happens.
5: I changed my VRAM to 16000-32000. Not sure how much this helps. (it doesn't)
Here are the settings I am using currently. (I don't think these settings help much if I'll be honest)
You can use higher settings, but it might crash sooner. If you're interested, you can make a VBS file and it will run DQ7 and delete those files automatically. Just put this into notepad then save it as "NAME.vbs". Make sure to edit it where you need to.
UPDATE: I will say upfront, the thing that did the most for fixing the crashing was deleting the entire eden folder and letting it regenerate itself. I just wish I knew exactly what was causing this in the eden folder. The first time I did this, I was able to play over an hour before it crashed. Trying again because it crashed in 20 mins. It might be the firmware/keys doing something. I really don't know. I do know that whats below is true as far as the saving is concerned. The settings probably won't have an impact tbh. My best suspicion is the configuration getting conflicts/corrupting very quickly so you have to have that fresh, make your settings, then forget it.
UPDATE2: So far, it seems the best option was to completely delete the eden folder, but if I had to guess, the config folder is the culprit. The game lasts for about 90 mins before it needs to be rebooted or it will crash. You can tell when its ready to be rebooted when menus drop frames. For instance, I get 30fps everywhere, but when I got to the 1:30 mark, going shopping was giving me 10fps.