Some creatures in Pathfinder we know what a group of them is called. (such as several ape-like fiend-creatures living in troops) What about creatures that have a little less in the way of real world counterparts (I'm pretty sure a group of Grogon are still a herd).
Some of my theories.
A Glory of Unicorns (yes I took that from the book. It fits)
A Pride of Griffons
A Firestorm of Phionexes
A Hassle of Goblins
A Wing of Dragons
A Imperium of Dragons (Lung)
A Conglomeration of Oozes
A Botheration of Gnomes
A Block of Basilisks
A Rumble of Bullets