About ALZ Drop rate.

Is there away I can change ALZ Drop rate?
I mean not the amount.
because when I put high drop rate, it wont drop alz.
I want mobs to drop very good items and less junk + ALZ, ex: if I am saying that mob will drop max 5 items, so it will drop like Chaos lamp, Armourgloves + 3, and alz, alz, alz, instead of dropping armourgloves + 4, armourboots + 2, armoursuit, armourhelm + 3, and alz...
Is there a way to do that?
Thanks in adv.

i have that problme to please help us.