My problem with GURPS is yes one its a toolkit and then unlike almost all versions of dnd it doesn't have a specific award and challenge system. Even Dungeon Fantasy doesn't have that and even the pyramid article "Its a challenge!" or the writers extra blog notes don't actually provide you with that.
Do you mean guidance for how to scale encounters and reward them?
Originally Posted by VladtheLad
Note that ritual path magic requires the dm to vet every ritual because even some basic stuff (mainly buffs and the books that add bonuses) are very abusable.