Question to coders - how to fool the Client?

[ChaosSlayerZ]

Greetings!

I know we have some great coders here across emu, on dev team and on various servers. So perhaps you guys can answer my question at least in theory.

One thing that always bugged me is how WIS and INT are seem to be hard coded as mana source for specific classes. So as caster you get your mana from INT and WIS is useless. The opposite goes for priests.

I want to change this system where both INT and WIS equally important. I haven't yet determine how that gonna work, but let say that INT gives all classes mana, where WIS increases spell power (or something else).
Now coding this server side - is 100% doable. But the CLIENT? As far as I understand Client calculates its own mana and hp, and there is no way to telling the Client - mana no longer comes from WIS for a priest or paladin.
Or is there?
So I am looking for work around, if you know any, please share your thoughts

Thanks!