First off I know people wont disagree with everything I'm going to say here, however I have been comparing the droprates of rune items from both Fire Giants and Black Demons. I have noticed that Fire giants appear to drop rune items much more frequently than Black Demons Despite the fact that Fires are a lower level. At first I thought this was mere coincidence, however I fight Fire Giants almost every day in the legends guild and have had several Black Demon runs with a prayer potion pray setup as well and in 20 mins at Fire Giants I get more rune drops each and every time than 45 minutes at Black Demons. Now I understand that this could be the effect of RNG and my luck or lack thereof, but each and every time I fight Fire Giants I always get at least 2 or 3 rune items in a fairly short amount of time and whenever I fight Black Demons I usually get shit drops quite a bit ( mostly Black Items,  Black full helm, Black 2H, Black shortsword etc) and I walk away after a 45 min to 1 hour session with much less rune items than the exact same time frame at fires. Sometimes I only get one or 2 rune items within the entire fucking trip!! Also I notice that the drop rates for nature runes for black demons seems pretty damn rare. In 45 minutes at Black demons I'm lucky if I get 70 nature runes whereas Fire Giants drop nature runes out the ass. A single trip with a inventory full of sharks ( I'm combat level 117 with 96/95/99 96 hp) I always get between 150-300 nature runes each and every time.