If your goal is to allegedly have fun then putting yourself at a max level is gonna eliminate that (though level here doesnt matter much but i get what you meant). The game is piss easy and contrary to my beliefs requires strategy if you just play it normally and dont grind the disgusting amount of jobs, races and comapnions they added which arent all needed or necessary (again, plenty of people who think the exact opposite of this)
These types of game that have overinflated numbers on them tends to have no proper balance especially when you reach mid to end game. Oftentimes those games demand your team to rely more on stats number that promote damage per screenshot rather than team and skill synergy where the fun of discovering diverse type of meta and niche gameplay are at.
The first few to mid stages are the most fun since they don't require too much grinding and there's a certain degree of strategies required to pass those stages, like in Disgaea games. But once you reach that stage where every ennemies' stats goes into the billions and you're now required to grind your life to hell, that's where the fun begins to wither.
I remember that the time I stopped playing this game was always when I had to grind for hours because some bosses requires more stats, or cheese strat than actual substantial strategy. I'm hoping that the cheat will at least alleviate the need to grind.