If you feed him with a 10k Element Ore, you become only 25- 35% Effectivity, with 25k Ore = 50-65% and the Best gives the 50k Element Ore with 100% Effectivity. You can pull him with Carnevore Rex or Charca to the Element, just watch He gives your PET no Damage. Only the last 20-50 Meters you can feed him on the last Slot Element. Enforcers are very good to pull him.