I'm not sure about the mana base, especially the 1 darkslick shores. It's good to have an additional blue source, but it seems like if you are looking for your blue source, it's likely to be on turn 4+ (for academy) and in that case you would rather have an untapped source. Maybe swapping the sulfurous spring for a blackcleave cliffs and the shores for a underground river would be better if we are looking for a 9th blue source?
Maybe we can try river of tears?