[@Pathfinder] Typical monsters they hunt are ogres, manbeasts (wolf/hyena/tiger/lion men), reptilians and mermen. These types have functioning communities, but aren't intelligent and usually hostile to people. Then there are hybrid beasts that are just straight up feral and wreak havoc wherever they go. Big game, colossal in scale, often romanticized in cultures as legendary beasts, the hybrids are the closest thing to demons most Seekers have encountered. 

There's a little under 500 seekers. Of the 500, only 80-90 actually live up to the myths told about them. Those few have in some shape or form battled with the paranormal to a mild degree (mainly dealing with phantoms or possessed people or beasts). The demonology aspect of their craft is reserved for the best/committed of them all, but its teachings and practices are still in their infancy. Basically there isn't just one tried and true method to combat the paranormal. The most practical way is using blessed/cursed items and just kill physical vessels, but to seal portals from the underworld, or exorcise demons from people/beasts can be complicated. That part will kind of open up to RPers as we advance into Emulis via NPC tag-along.