East region

Duke (#1), UConn (#6), Michigan State (#9), Kansas (#15), St. John’s (#18)

High‑pressure spots:
• UConn (#6) vs Michigan State (#9) — Sweet 16 / Elite 8 path
• Two top‑10 teams colliding before the regional final.
• Whoever survives is a fully legitimate Duke killer.

• Kansas (#15) vs St. John’s (#18) — Round 2 / Sweet 16 path
• True 15 vs 18 matchup disguised as 4 vs 5.
• Winner is a real threat to Duke in the Sweet 16.

Realistic non‑1 regional winners:
• UConn (#6)
• Michigan State (#9)

If you want one non‑1 in the Final Four, East is the cleanest place to take it.

West region

Arizona (#2), Purdue (#8), Gonzaga (#11), Arkansas (#16), Wisconsin (#20)

High‑pressure spots:
• Purdue (#8) vs Gonzaga (#11) — Sweet 16
• 8 vs 11 in true strength, disguised as 2 vs 3.
• Winner is nearly equal to Arizona on a neutral floor.

• Arizona (#2) vs Arkansas (#16) / Wisconsin (#20) — Sweet 16
• Both 4/5s are top‑20.
• Arizona’s path is not soft despite the weaker region.

Realistic non‑1 regional winners:
• Purdue (#8)
• Gonzaga (#11)

If you want to fade a 1‑seed cleanly, Arizona is the most logical structurally.

South region

Florida (#4), Houston (#5), Illinois (#10), Nebraska (#13), Vanderbilt (#17), UNC (#22)

High‑pressure spots:
• Houston (#5) vs Illinois (#10) — Sweet 16
• 5 vs 10 in true strength, disguised as 2 vs 3.
• Winner is a coin‑flip threat to Florida.

• Florida (#4) vs Nebraska (#13) / Vanderbilt (#17) — Sweet 16
• Both 4/5s are top‑17.
• Florida’s margin is thin against either.

Realistic non‑1 regional winners:
• Houston (#5)
• Illinois (#10)
If you want a second non‑1 Final Four team, South is a very defensible place to grab one.

Midwest region
Michigan (#3), Iowa State (#7), Virginia (#12), Alabama (#14), Texas Tech (#19)

High‑pressure spots:
• Iowa State (#7) vs Virginia (#12) — Sweet 16
• 7 vs 12 in true strength, disguised as 2 vs 3.
• Winner is a live dog vs Michigan.

• Michigan (#3) vs Alabama (#14) / Texas Tech (#19) — Sweet 16
• Both 4/5s are top‑20.
• Michigan’s path is not free, but slightly cleaner than Florida’s.

Realistic non‑1 regional winners:
• Iowa State (#7)
• Virginia (#12)

If you want a third non‑1, Midwest is the next most rational place.