In my opinion, best faeries would be humans but with all the defining characteristics of an arthropod or insect.

They'd be non-strechy, and not have the ability to take on a larger size, however, they would be very sexually adept, especially due to their abilities of chemically inducing mental states like obedience, lust, sleep, or paralysis.

they'd have a hive mind with a queen and a lot of workers and warriors, an they would use human men for reproduction.

All the members of the hive would share one man, since the queen if linked to her underlings directly, she shares her senses with them, the swarm also bears the queen's thoughts, so when the queen tells you she loves you, you know that the entire swarm is telling you that as well.

Something like the above, am posting in hopes some of that inspires you, and yes, I did turn faeries into a miniaturized cute girl version of the zerg/tyrannids, sorta.