I was able to capture that Calm IV spread on a Swablu. Not completely useless, but Altaria really doesn't benefit from Emerald tutors. I'm still trying for Lotad, but I thought I would let you know that I was able to get one :D
If I were to switch synchronizers, the only thing I have to do to capture a new IV spread is to change the amount of time I wait before Sweet Scenting, correct?