With Expbanks atm your only able to use yours and yours only, However Im sure with lwc there is some way to get around that and have it so if you wanted to give another player exp you would just Place a Expbank and do /cmodify name. If that suggestion is not possible then maybe a way of depositing exp by using commands so just /expbank would put it in a ecomonyish bank and if they wanted to take it out they would have to do /expdeposit And they would be presented with a Hopperish menu that would ask them how much exp they would want to take out and once they clicked on a amount it would be given to them and be subtracted from their existing account!
Basicly that!