You are right. What will happen, if a Domination world have at least 300 player or less?"No endgame" is not an endgame
That brings me to another few thoughts, let’s say, somebody wants to finish Grepolis, because he/ she found a new job and have no time, or get a baby and have no time or something else.As in wiki statement is written: ''On casual worlds players cannot attack other players when there is more than 20% difference in points between them ''
So that understand in : if the player is small and the point difference (to his target) is greater or equal to 20% he can't send attack.
The calculation is just like a doctoral thesis, you need for every city transfer have to be done very careful. Only during a short period, the giver lost his cities could use for the transfer. The giver and the receiver have to be nearby the same points (i.e. +/-20%). If the receiver couldn't conquer the city during this period, he lost in every case the chance of the city, until it is a ghost.
It's really sophisticated for a few cities and I do not think it might work.
Furthermore if an inactive player has an active administrator, there is never the chance to conquer the last city, was it?