For me it is almost as hard to get a troll head to drop as a wyvern head. I end up cleaning out the ruined keep three or four times for just one head (except the boss). So my question is, being I do not have a dungeon set up. Do heads drop very often in a dungeon room with a troll spawner? If so what level spawn do I need to set up? I have no interest in dungeons, but will make one just for the trolls if it is a reasonable thing to do. Any suggestions other than visiting other people's creations.