Controversial issues and their resolutions.

According to the rules, yes. There is nothing mentioned about the possibility of multiple paths. However, I wouldn't like it if there was a strong Guardian on the way to my Castle. And somewhere in an invisible corner of the main spawn points, there was a weak Guardian, and my opponent would break through it (and I might not even know about it) and pass by the strong Guardian on the way to me.

Added 3 minutes later

Here's another question, by the way. Today I was playing with Oelm, and during the game, he started arguing that you can use scrolls without building a Guild Hall of the same level if you have a spellbook (not of that element). I immediately said that it's not possible, but he insisted so confidently that I started to doubt, maybe I'm wrong? Please, someone who knows, give your opinion.

I don't think so; it would make the spellbook too powerful. And by the way, I would like to clarify whether it is possible to use scrolls with third-level spells without building a Guild Hall 3