I can tell you from my experience that all types of currency in this game are server-sided, as well as energy, cantina energy, sim tickets, equipment, number of shards, etc... That means that you can modify their values only visually, due to the fact that the real values are stored in the server (cloud), not in the client (your device). So, if you increase your energy value (in your device) and try to spend more than you really have (in the server), the game will crash and restart.
However, you can modify in-battle values indeed. There are several mods out there that allow you to enter god mode (immunity) and extended damage. Besides, you can use GG to scan and edit your characters' parameters in-battle, giving you more speed, physical attack, defense, skill cooldown set to zero, etc...
In other note, I would like to know if the drop rate values can be edited, or are they server-sided too? I suppose they are, but I'm not 100% sure.
