Board Thread:General Discussion/@comment-28562632-20160702181134/@comment-5498154-20160703064810

Manager is technically a downgrade to the Overseer. It gives a lackluster bonus that you don't really need in exchange for half your drone production speed. That, my friends, is just not that great.

Necromancer is an okay take on a drone producing class. It can produce more drones than any other drone class, but it doesn't have a very effective way of producing drones, and can't recover quickly from having its drones destroyed.

The Overlord has double the drone production rate of the Overseer, making it a direct upgrade from it. There's no real downside to this, so I'm voting for Overlord.