Retals need to give retals. You saw it last round where after players in top were broken by multiple hits they actually grew in castles because they were able to freely take every retal and not have to worry.
Gangbangs need to be possible or it will prove exceptionally hard for to break kingdoms that get out in front.
CLI is abusable in big ways. If someone hits me for land, means they didn’t take a castle and don’t get CLI, means an ally of mine is probably about to get an easy castle. It takes away the tactic of watching the KHoF to snipe easy castles of larger kingdoms when you see they make a hit.
Another random thought, what if after 48 hours castles of being built/acquired via attack they became permanently part of your kingdom. Kingdom A hits Kingdom B. Castle is taken. If kingdom A has 5 castles with the 4 of them being permanent the new 5th castle is the one just taken and only. Turns into a game of chase the castle. I think this also leads to slow sustained growth. By the time Kingdom A is ready retal it might already be with Kingdom J. Idk. It’s an idea. Poke holes in it fellow thought leaders.
Maybe make castles cheaper and faster building. Doesn’t hurt as much.
Only defend with half your army. Prevent castle wipes. Makes the retal harder though… maybe not a bad thing but maybe a terrible thing. Boost up smaller KS army strength when taking retals? I would think only do the boost when the ks difference is larger than 20%
I’ve had many ideas for Thardferr some good some bad. Probably mostly bad. I still apologize for CTA and orc wolves live on no matter what to do damage… oops. Solving castle passing and pre/re is not possible. The most simple straight forward option is retals give retals and you can BF but with heavy penalty (this needs to be heavier like no castle below 70%).
I think removing the ability to attack inside your own province is a safe thing to put in.