Something interesting... it say's here
http://uo.stratics.com/database/view.php?db_content=hunters&id=3238#stats that his slayer vulnerability is mage slayer I believe that is a property on talisman.
Person casting the net should have as much luck as possible in order for the chance to have scalis pop. GM fisherman has automatic luck increase of 25%. Add to that luck suit, add again the uo statue luck and finally the sphinx or the fountain luck buff. (We should get a city trade deal for luck !)
After that, the luck (item number drop, amount of properties, intensity of properties) is gauged off of the total luck of the highest damaging individual. In most cases that would be the tamer in a high luck suit. Also everyone in the parties should allow the tamers to do the most damage to take advantage of luck.
Finally, leave the leech weapons at home for this fight or develop a macro to switch out weapons when the tainted life force aura is active. Enforcer activates a tainted life force aura which can cause life leech options/skill (i.e. Vampiric Embrace) to hurt the player rather than heal, making Sampire template relatively useless.
Here are my sources:
Luck -
http://www.uoguide.com/Luck#Perfection
Osiredon uoguide -
http://www.uoguide.com/Osiredon_the_Scalis_Enforcer
Osiredon stratics -
http://uo.stratics.com/database/view.php?db_content=hunters&id=3238#stats