No AI mod?

[Ruatha]

I'm thinking of starting a PBW game and then be strict about the turn deadlines.
This means I would use the No-AI mod.
What to do with the empires taht are without player? If a player drops out and we don't get any replacement?

Currently I'm considering:

I as host go in and fill up the queues for defensive means. Builds planetary minefields and defense ships.
Offer everyone peace. Does no ship movement.
If I as host am in conflict with this empire I can't continue that conflict.
I will be participating in the game myself.

Any other options??