It seems mage has only 3 options right now, Highlander, Casino, Spell of which Highlander is the only one taken seriously. And after climbing to legend with Tempo Mage I don't know why it is not more popular. As deck tracker is not working I cannot show statistics, but going from diamond 5 to legend was really quite fast.
I’ve been having success with the version streamed by apxvoid (+2 CC’s) and it’s pretty incredible. You can both burn down face and/or generate massive boards. I’ll try running your elemental decklist. But yea imho next meta breaker for sure