As we all know, it's possible to warp from your homebase straight to the middle part of the map, if you got the warpstone or cloak of night. Lord Erebus can do it much easier, as his bat swarm has longer range.
However, you can't do this with Unclean beast. (And possible with rook, but haven't tested this.) This/those demigods are so large, that they can't get close enough to the edge of the platform, and can't warp to the middle parts of the map.
This is not balanced.
Simple solution: make the warp range 16, instead of 15, I think it should do the trick and allow every demigod to use the warpstone equally.