I wouldn't mind a real Slugfest also

.
I only disagree with 2 of your rules Panther :
2. 40% Victory conditions . In a 120 Map such a Victory condition is not needed at all because once one player has 80 provinces the other player will most probably surrender .
40% Victory condition on such a map encourages abuse of false horror spamming as caelum or similiar cheesy tactics .
6.Pbem instead hosted
We could try to get a mosehansen spot or Aku hosts . If these 2 fail then i wouldn't have anything against pbem also .
Further suggestions :
We could try Zens spell mod for this game . Maybe we could tweak it a bit and make blood a bit more expensive then also by adding +50-100% costs to the bloodsummons .
Otherwise blood nations are way to strong if we really do a 10-20% magic sites setting .
Either that or playing without real Bloodnations , but that would be Marignon DF , Vanheim , Jotunheim , Ulm BF , Abysia , Pangenea and Mictlan because all can bloodhunt .
Mictlan and Abysia would probably be the best 2 nations otherwise .