Can you do Occulus Solo?

So Im trying to do the Occulus for my mage class hall stuff for the transmog. I’ve got to the point where I’ve killed the first boss and the 3 npcs come out I picked the bronze guy but no drake spawns. Do the other 2 roles need to be there?

You used to be able to solo it; I don’t think I’ve tried since War Within came out so it’s possible they broke something. But I thought the Mage campaign was a different scenario than the regular Oculus dungeon.

Nope the quest took me right to it.