Why is that in beta decks? SoP is already in game.
The developed strategy is basically a pestosis in which you exchanged the dragon/vampire/SL for SoP in order to deal the additional damage. The delay makes it not very competitive IMO.
You can also have a look at that (
http://elementscommunity.org/forum/index.php/topic,36261.msg494669#msg494669). It also makes use of the burrow/SoP synergy ...