Board Thread:General Discussion/@comment-110.146.149.161-20150813074512/@comment-25555436-20150903000649

No it wouldn't, because 1x1=using 1 spell and as such the result is 1. While 1+1 is using 2 spells, in this case activating Dust, which costs some Aura, followed by activating the Semblance, costing more Aura, and as such the result is 2.

I'm not speaking of simultaneous use, but consecutive use. A fireball followed by a force push, instead of just a fireball. The overall result is smaller-costing.

Using it simultaneously would likely be the way to combine Dust with Semblance. Those cases would likely result in just 1 spell being used, not 2, though said spell would obviously be of a slightly higher cost.