It's undeniably the strongest brew I've ever assembled.
Fleeting Spirit + Unearth turn all control lists into mincemeat. It out-values every midrange list in the format, only losing to them via the random instant-kill combos that midrange decks now accidentally get to pull off with zero investment (But only when we don't have removal.) And it has enough interaction to clamp down on aggro, though some extra life sustain would be nice for that. Pheonix struggles to push anything through all the exile and Raffine.

Discarding Dorothea to Fleeting Spirit on turn 2, then cracking back for 7 on turn 3 is kino as all hell.

The sideboard needs a ton of work still, but it's serviceable.

Shame that Pioneer is a dead format. It's the only format left that's not so redarded that brewing in it has no purpose.