[Tyrant]

I haven't really messed with it in Dom3, but Carrion Woods was a powerful theme in DomII. The hordes that you get from it are weak in several ways- low protection and vulnerable to both the anti-magic being astral spells and anti-undead spells, but they are also vicious and numerous, especially if backed up with casters and other troops. The darkness BFE and and Swarm spamming Pans worked well.

I'm thinking that in Dom3 the way to go would be to try for Mother Oak first and then Carrion Woods. Since it is not directly offensive, i'm not sure that it really would be that easily dipelled. Many nations do not have the astral, and it's harder to go sideways. Unlike, for instance, Burden of Time or Wrath of God, it will not nessicarily inspire a group effort to dispel it since it does not directly affect everyone.