mtool is a pretty powerfull cheat engine that need a pretty good pc if you want to use it without to much lag or crash.
One of the most important thing to decrease the lag and crash is to not skip dialogue or the prompt at the end of fight or the new ability you earn after level up. If you use the cheat with the seed, only max 2-3 job before leaving and wait for the game to give you the new ability without trying to skip them. That can be slow but that the best way.
Same if you increase the xp from fight with like 1000% and have your full team with low job so they all learn new ability, don't skip.
The starting freeze is mandatory because Mtool is looking to link himself with every data of your game and at the same time loading a big fat translation of the entire game.
If you have used any cheat engine on another game you should know that the 1rst thing shouldn't even be possible with this speed and constant refresh.
I can't even understand how this is possible after having using cheat engine on any game.
At the end of the day you can try using bob mtl and use another cheat engine (like the most well known
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) In my opinion it's worst because you need to do multiple scan to find the data, but if you only need to spam seed level up, it's pretty ok.