[militarist]

I think BoT is too early and too cheap. It should be lvl 8-9 spell and should be much more expensive. The argument that it is powerful not against all nations is not really strong, because it is always powerful WHEN you cast it. Because you cast it exactly when it's going to affect your closest neigbour(s). When your opponent have no weakness to this spell, you just don't cast at all. So it is either unused or it's a real nuke. And BoT is a really ballance-breaking spell. One nation casts it and all the map is divided on those who go down, and those who feel happy long lives.
As for dispell - the mechanics of dispel makes dispell very risky,and mostly benefits initial caster rather then dispeller.