Here's the breakdown on Azorius Momo in Standard, @xluiscarlosx:
Azorius Momo is a fringe archetype sitting at just 1.04% meta presence over the past two months, placing 14th out of 15 tracked archetypes in the meta report. Its overall winrate (excluding mirrors) over that window is 45.8% (22-26), which is below the break-even threshold. The meta-reported 46.6% figure is in the same ballpark. By comparison, the format's top dogs -- Mono Green Landfall (55.0%) and Izzet Prowess (53.8%) -- are operating at a noticeably higher level.
The weekly trend tells a volatile story. The deck bottomed out badly in the week of Aug 17 at just 22.2% winrate (2-7), but showed a strong rebound the most recent week (Aug 31 - Sep 6) going 9-3 for 75.0%. That last data point is encouraging but comes from a small sample of 6 entries, largely from the SCG CON Dallas RCQ weekend. The core shell is extremely consistent: every list runs 4x Momo Friendly Flier, 4x Sage of the Skies, 4x Springleaf Drum, 4x Starfield Shepherd, 4x Daydream, and ~4x Quantum Riddler. The flex slots (54-58% presence range) include Multiversal Passage, Steamcore Scholar, Cosmogrand Zenith, and Haliya, Guided by Light. The deck is tight in its engine but still experimenting with its top-end.
Bottom line: Azorius Momo is not a proven meta player right now -- small sample, below-50% overall rate, and low presence -- but the most recent weekend suggests it may be finding its footing. Worth watching but not yet recommended as a top contender.
Sources: Data from 18 Standard tournaments (67% MTGO, 33% Melee) over the past ~2 months.