[llamabeast]

The trouble with that is that the appropriate cost depends on the size of game. For a small 4-player game, vey cheap clams would be appropriate, while for a huge game they should be very expensive in order to avoid being no-brainers. There's no cost which is appropriate for all games.

Apart from that, I think it's horrid that a player can be reduced to one sieged fortress, but still be effectively at full power because the fortress is full of clam bearers. It completely disconnects power from provinces and armies.