The fetch lands synergize with
Sensei's Divining Top. If I look at the top three cards and don't like any of them, I can play and use a fetch land to shuffle the deck, putting three new cards on top.
I would never use
Castle Embereth. It's ability costs effectively 4 mana, and just isn't good.
Vesuva has two problems. It enters tapped, and the only land that's worth copying is
Ancient Tomb. A basic
mountain is just a better choice.
I have used
Throne of the God-Pharaoh in the past, but there are better things to use for a damaged-based win. Most of these things I went over in the primer, so I would suggest reading that if you have any other questions.