Every psychic would love to cast the strongest spell that really work fast in delivering the intended target, but why would a spell not work fast?
First and fore most , the intentions of both the spell caster and the one seeking help have to be mutual in order to have positive effects.
The powers and experience of the spell caster also holds a big play ground towards fast working spell casting.
Availability of spell requirements matters hugely for eloquent results. Although spell results may vary, you are most certain to get the desired effects.
Therefore in a nutshell, several factors can affect the turn around time of spell results.