Looking at this thread:
http://www.shrapnelcommunity.com/thr...5&o=&fpart=all
it looks like Vanheim, Machaka, Agartha, Ermor and Marignon would be the main culprits concerning being "overpowered" due to a heavy bless strategy. So if none of us wants to play any of those we should not even think about restrictions on bless.
But since I have played neither I have no idea even IF someone wants to play one of those nations a restriction is needed...
CharonJr