I wiped the island, and after many deaths, I can say they are definately NOT common. None of the various drakes, nor the sphinixes. So unless I did something wrong or got very bad RNG the rarity needs to change. 18 mobs I'd say and no crown.
I was on a raid in pos made it to the 6th island and im a mage!!! the bee boss thats there was bugged and was flying off the island so we couldnt go to the 7th island! that really stinks!