Specialist idea: Empress

I have been thinking about specialists as I often do. The thought came across my mind about an emperor. Originally I wanted it to be promoted from a king but I eventually figured out a way to balance the added benefits. I eventually figured that a queen promotion would be interesting. Here is what I came up with.
Empress - Chariot Rider
Promoted from queen
Can hire a specialist every 48 hours. All factories produce an additional 5 drillers per production cycle and all subs travel at x3 their normal speed. If you lose control of your empress you are eliminated from the game.
You trade the advantage of specialists for an increased driller capacity. I think this is a somewhat thematic specialist. Empires would conquer a lot of land but thier leaders were often hard to trust. Any thoughts?
Empress - Chariot Rider
Promoted from queen
Can hire a specialist every 48 hours. All factories produce an additional 5 drillers per production cycle and all subs travel at x3 their normal speed. If you lose control of your empress you are eliminated from the game.
You trade the advantage of specialists for an increased driller capacity. I think this is a somewhat thematic specialist. Empires would conquer a lot of land but thier leaders were often hard to trust. Any thoughts?