mobile domes?

[FrankTrollman]

You run the risk of unstoppable armies dominating everything.

Right now a small army can be cut off with a mind hunt or earth attack. A medium army can be pounded into the dust with a pile of ghost riders. A large army can be caused unacceptable losses with a murdering winter. There is a counter available to every offensive strategy, and it's roughly structured in cost to the size of the incursion it is set up to jimmy-kick (except Ghost Riders, which are too cheap when used to kill medium-sized attacking armies).

So I'm left asking, what is the blinding necessity of allowing people to attack at will with an unkillable pile of badasses? Is there something I'm fundamentally missing that makes offsense impossible at high levels? That certainly hasn't been my experience so far.

-Frank