Different type of walls

I think there should be an option for scenarios where you can enable "scenario walls" or whatever you'd want to call it, where the walls don't break until there is less than a total of 2 units between either of the wall stacks (so if theres a 2-1 unit wall, and it ends up as 2-0 at the end, the wall remains and the wall becomes 1-1), I think this would be very useful for some scenarios and would make them very fun to play.

That would be awesome.

And allow some extra-long walls would be good aswell.