Dalamar
Adventurer
This is probably an oversight, but it seems Eternal Mountain Defence is the only Elemental Discipline learnable at 11th level that has a cost of 5 Ki. Which the Monk can't spend until level 13.
Somewhat related, but does it feel odd to anybody else that the maximum ki you can spend doesn't increase at the same levels where you gain access to new Disciplines?
Somewhat related, but does it feel odd to anybody else that the maximum ki you can spend doesn't increase at the same levels where you gain access to new Disciplines?