When your opponent is stuck in Feudal and you have a fishing boom, go Burgrave Palace as HRE.

Meinwerk always gives you a good amount of value, especially when you age up to Castle Age. Like the steel barding is just such a big upgrade to have on your knights when you're up against a really good knight counter like the Camel Lancer or the Desert Raider. Having an additional two armor means that the Desert Raider, their ranged attack suddenly deals a lot less damage to you. They're not going to be able to kite you indefinitely with their ranged attack.

Possibility of a Burgrave build here. I doubt it, just because Ayyubid is one of the hardest to do it against.

It's kind of tough to play range units against Ayyubids a lot of the time. Not only because of the Camel Lancers, but the potential for one of the best siege in the game.

You don't really have the timing to get much damage done as HRE. And if you just rush castle, you might get there first as HRE, but the economy for ayyubids is actually going to be way stronger in that initial castle phase. And it's going to be a free ramp up for them into their timing with the camel lancers, with the archers, and god forbid.