It's a great mod, all version (V1, V2, V3) are working although for V1 it's still have bug. (It's not good right? If your characters pass the level cap or break the normal limit) so for me I play the mod like this :
1. Download All Version
2. Install V2 and clear the tutorial (don't worry you don't have to cheat to clear the tutorial tho)
3. After that if you want to leveling up your character, go install V1 and overwrite V2 (don't uninstall it, just overwrite it kay) note: you can measure how exp boost in V1 work, if your the level cap is 30, you can use the boost for 2x (it will make you at least lvl 26). If the cap is 40, then it's 3x or 4x (it will make you at least lvl 31 or 36)
4. If you want go for Event or Stuck at Boss in some way, Install V3 and overwrite your current version (DO NOT UNINSTALL IT)
5. It sounds roundabout, but don't worry it doesn't consume data too much, cause you're overwriting it not uninstalling it.
My conclusion for using this mod the best Version is V2 and V3, using V3 only change your stats, you still can level up your characters (not your weapon sad tho) and the stats will change to normal when you change to V2 if you want to participate for pvp or etc.
I hope V1 exp boost can get better in the future, maybe you can give us exact value of exp boost (example: 10.000 exp per fight) something like that.
Thanks for amazing work and mod, peace.