Anyways, I managed to beat them on about my fifth try. Was hard, but very satisfying. Also got the tail of one of the Gargoyles, which unfortunately doesnt seem to be that great of a weapon.
Anyways, the fight actually wasnt that hard (way easier than the Maneater-fight in Demons Souls). The attacks could easily be blocked, and was very easy to spot, meaning that you should never really loose any health from the normal attacks. I tended to be confused when the Gargoyle flied, but then just started to stand completely still when he was in the air. This also resulted in him landing very close to me, giving me a good spot to get in a few strikes after blocking his attack. Stuff got way harder when the other guy arrived, but I was a bit lucky, and managed to corner and finish off the first one almost immidiately. Then the second one was a joke as his fire was way to slow on its own to be of any danger.