The building of a system, you need to know how your energy will work. Is it going to be pipe based or wireless? If it is pipe based you need to know how to transfer that energy between pipes, will you store it in a single pipe, if you have pipes connected from one place to another and break one connection in the middle what happens, how do you separate the pipe system? If you plan on it being wireless how will you send it, in an area, through whitelisting, or through the player like extra utils?