@pugsuperstar

You're not cutting a creature in the matchups you bring in Gisela or the dragon. That feels incorrect. I think Muldrotha's out vs. shops and Xerox.

I would probably cut an Island vs. at least dredge.

Maybe @brianpk80 can answer this better, but I think you can cut a number of oaths in the PO matchup.

Depending on the flavour of dredge, I think you can cut 0-2 FoW.

I prefer the more resilient versions for several reasons. Though I haven't been able to join as many Dailies this month as I was in May, June, and July, I had a lot of success then with lists that walked the line between Paradoxical control and Cantrip Gush-Delve.

The main reasons I've preferred the Paradox lists with a Mentor win-con that are not "Opal Soup" are:

Lower frequency of hideous mulligans. Less games auto-lost due to inactive Mox Opal(s). Better equipped to win despite Stony Silence/Null Rod. Monastery Mentor is the best answer to Monastery Mentor Able to change roles, particularly post sideboard. For instance, when an opponent can be expected to overboard v. Paradox with Null Rods and artifact hate, I board out Mana Vault, sometimes EE, and 1 or 2 Outcomes, morphing into more of a straight up Mentor deck. Paradoxical Mirrors. The control/resilient versions have been substantially more favorable in matches v. the combo lists.

@walsh (17 days later) I've played some matches with Spyglass. I'm ... pretty medium on it. Turn one Spyglass on the play hasn't been the backbreaker I was worried it might be, it's almost always been worse than a Sphere or Chalice for me. However, with a limited number of Spheres and Chalices available, it's not like you have to cut them to fit a few Spyglass maindeck. I've liked the card more than I expected in the mirror and against Eldrazi decks (name Eldrazi Displacer most often). The extra boost the card gives in the Drege matchup is notable, too.

My personal conclusion? I like the idea of running 1 or 2 maindeck ... but I wouldn't run 4, and I wouldn't value it too highly as far as mulligans and turn 1 sequencing is concerned.

In the actual meta (see the last vintage challenge) it could make sense to maindeck Containment Priests. Dredge and Oath are stronger than ever and the Ambush Viper mode of the Priests make them even usefull in almost any matchup but Storm and Paradoxical.