A pot cost system that actually makes sense

How would that make the slightest difference?

Mages would still do the same thing they'd just double the prices they charge for leech.

Mages have ultimates. Asking them not to use them is like asking a warrior not to attack things. The versions where they're unusable like KMS are just sad because the ultimates are as worthless as infinity.

The fact the game is currently designed so poorly that only mages have an advantage is not the fault of mages. It's a bias Nexon built in by not releasing sufficient areas to cater to the entire population.

These endless threads trying to "fix" mages just need to die.

With the current prices, magicians earn money by training with ultimates. Now, with double the price, they'll lose money. This means paying for leech will remove money, and finally, leeching would not be profitable. In the end, people won't pay for leech. Training the "normal" way would be more efficient money-wise for magicians. For other classes, they won't be hurt much.