Your plan seems very slow to me and I can't help but think the book is better suited for a Priestess than a Priest. The Priest tends to want to be considerably more aggressive than what you've described, at least in my experience. Still, your book has the potential to run faster than your suggested opening should you choose to do so, and that's a GREAT thing for a book to have. Multiple options and ways to function.
To start, I would not put down a double spawnpoint. Either go with Battleforge (my recommendation) or the Temple of Asyra, but not normally both. If you go with Battleforge, you might try rushing your opponent while gearing up your mage. Only summon one or two creatures for support, and then light their world on fire. If you go with the Temple, you can worry more about building up an army and there are multiple things your mage could do in the mean time.
As far as the construction of the book goes, you should definitely have more Teleports and possibly more Dispel and Dissolves. I would also include more Purify as I found out from Charmyna awhile back that they make excellent fodder to pop enemy Nullifies with. If you think your opponent has a Nullify on their creature, you can cast a Purify on it completely free of charge, no mana spent at all, and force them to reveal their Nullify. Overall though I think the book is pretty solid and versatile.