So I'm posting an update to elaborate a little bit on the tactic. I've been using this tactic pretty much since day one of FM21 and it hasn't dissapointed me yet (thus all match engine versions).
The tactic was inspired by how Ziyech used to influence Ajax's game and as we have seen off and on at Chelsea when he was not injured. In practice however it was very difficult to get the right midfielder to provide many inside curling crosses from deep, however the tactic still works quite good...