Grixis Therapy seems to have been picking up some steam in the top deck lists as of late. And while I don't have anything innovative to add to the archetype, I noticed there wasn't a thread for this topic and I mainly wanted to ask a question:
Why only 3 Gush?
It seems like all the Gush decks of late have been 3 Gush, 3 Probe, 2 Preordain, 1 Ponder. 3 Gush makes more sense for accommodating a Mentor variant, but when I attempt to consider a 4 Gush, 4 Probe variant, the obvious go-to is Grixis Therapy. Have the recent Grixis Therepy lists just been using a cookie cutter Gush shell, or is there some actual reasoning behind it?