During the course of a war, you might slay 3-4 dragons. If the other kingdom wants to, they can just keep sending another dragon. Is it really worth it if they're just going to keep sending more? So assume you don't slay any, it's a huge hit on income, dme/ome, and draft, but isn't it worse to lose 3 specs per acre only to have a fourth dragon hit you that gives you the same penalties in the end? How much dragon-free time is worth the cost of slaying it? In other words, if kingdom A immediately sends their specs to the dragon, how long until kingdom B (who tanked their dragon) has suffered the same amount?