Why is Voice of Apsu conj 3?

[Morkilus]

B0rsuk said:
Making things assymetrical is nice, but I think you should've made some gameplay excuses for this.

Well, I should have been more clear, but I was trying to point out that the Conjuration site-searchers are already in a good path that pretty much everybody researches eventually. Thaummaturgy isn't that important for many non-astral nations. This makes Voice of Aspu actually easier to research if you're going for early summons as well.