Since there are no curses in the game, why not expand our ONLY (standard) prayers option in the game to include the following:
Rigour
*Increases ranged by 20% and defence by 25%
Requirement: 50-100k PKP???
Augury
*Increases magic by 20% and defence by 25%
Requirement: 50-100k PKP
NOTE: This is just a proposal, please detail any suggestions you have below!