FearLess Cheat Engine

When you get to the screen to pick your leviathan, you have already spent 10. So search 4 byte for 10. Now select the snow field or the dead god realms to spend another 10. Now you have spent 20, so search for 20. Now move it back to the treasure island because its free. Now search for 10. Repeat 2 ...

For XP, do a unknown value search. Fight a battle and when the after battle screen pops up, it says team was awarded X amount of exp. Do a increase by X search. Repeat until you have 5 or 6 addresses. Save your game if you have not already and then set them all to something huge. Fight a new battle ...