Originally Posted by
Kawar
There really is no trick to it just turn around and keep casting dia the more tp you give it the better you are,spell farming is not easy at all but later on some of the spells really pay off.But yes you are doing the right thing i would say use the weapon that is the weakest skill you have or lower dmg so you do less damage and you still give it tp the point is not to kill it right away.but yes people have reported a better chance of the mob using the spell around 50% or lower in hp.
there is also a rumor that if you get the mob low and he uses the spell if you kill it fast it has a better chance of giving you the spell but i do not know any thing about if this works or if it is even fact.