Maybe you have this already on your server but anyway look at this
my idea is that there is a head master of the magician and he can transfer the mana to someone else once he needs it. so the power of magician get bigger. and too, not to use a mana fluids but a diamond that you can storage energy in it.
The diamond staff i can do for you
the other system i already trying to search the way to do it (maybe like exura sio in rl tibia only with mana? and that it thinks how much mana you have and gives half of it to your friend?)
i will post a script soon.
p.s the diamond way can be with a storage id. so when you die you will have the diamond strength still.
p.ss the diamond can be bought in a shop or can be found (but will always have the amount of mana you put into it. every diamond have x amount that you can storage in it and you cant have more then one diamond in the same color that will do the effect.