[Endoperez]

AFAIR, wishing for 'gems' currently gives just enough gems to alchemize them to 100 pearls. That is how it should be, IMO.
Wish should be about choice, absolute choice, of getting whatever one might want to play with. It should be choice of "what is worth it" instead of "quess the password". The choices should all be beneficial and of about similar power-level. Of course, this does not mean all units should be able to face each other in combat, but that wishing for powerful monsters shouldn't always or even in most cases be the optimal choice.