I am building my strategy this way because I decided that crossing out castles for myself is a bad plan specifically on this template. But let's say I'm playing red and decided to cross out bad castles for myself. What can I cross out, do I really have that many bad castles? Necro, four double-bilds, Dungeon, Castle — that's already seven excellent castles. Conflux is a decent castle in my opinion. So, I crossed out Tower. I even crossed out Conflux, let's say. But then, I ask you, what am I supposed to cross out next with such a strategy?
The general principle here is this — you sort the castles by strength, for yourself and for the opponent (the order may be different), then you either cross out from the top of his list or from the bottom of your list. He does the same accordingly.
If both cross out competently, you end up with a roughly equivalent pair, and which one exactly depends on the crossing-out strategy. Alternatively, you can try to catch the opponent making a mistake — if he sorted the castles by strength incorrectly.
