@aeonsovarius Blazing Archon doesn't stop Walking Ballista and is much more annoying if it gets Metamorphed. The funny thing about Gisela is the damage reduction/increase occurs in parts and the person taking damage chooses the order in which they are applied. Gisela attacks into Gisela, apply damage reduction (5->2), then damage increase (2->4). Giselas bounce. Attack with 1/1 or ping with Ballista, apply damage reduction (1>0), then damage increase (0->0). MTGO does this optimally, but you should 100% know this interaction if playing in paper. It's non-intuitive, and you are allowed by the rules to screw it up (double damage, then half damage).

And yes, if your version is running 6 drops and Walkers, it was probably designed to become a control deck post-board against decks like Jeskai that are boarding in enchantment removal, cages, and preists.

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.