This surely needs to be tested, like, a lot

@Fox·Constructed·90 cards
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Decklist

Mana Base

Cost distribution, atlas threshold supply and coverage analysis

Spellbook
60
non-site spells
Atlas
30
sites
Avg CMC
3.4
spellbook cost
Primary
Water
14 of 30 sites

⚠ Atlas Coverage Warnings

Waterhardest card: Mesmerism needs 4 thresholds. With 14 sites you expect 4.0 at turn 7. Recommended: ≥ 18 sites.
Airhardest card: The Doom of Dilmun needs 4 thresholds. With 14 sites you expect 4.0 at turn 7. Recommended: ≥ 18 sites.

Cost Distribution — Spellbook

WaterFireAir

Atlas Threshold Supply

Sites providing each element threshold. Recommended minimum is based on your deck's highest demand.

Water14 sites · 17 threshold pts⚠ Risky
18
14/30 sites (47%)needs 4 threshold · min 18 sites with the threshold recommended
Fire14 sites · 17 threshold pts✓ Covered
13
14/30 sites (47%)needs 3 threshold · min 13 sites with the threshold recommended
Earth1 sites · 1 threshold pts
1/30 sites (3%)
Air14 sites · 17 threshold pts⚠ Risky
18
14/30 sites (47%)needs 4 threshold · min 18 sites with the threshold recommended

1 neutral site provide mana but no element thresholds

Threshold Coverage — Expected Supply by Game Stage

Shows how many thresholds per element you can expect after playing 5, 7 or 9 sites. Dashed line = your deck's maximum demand for that element.

Water· hardest: Mesmerism (4✦)
Fire· hardest: Day of Judgment (3✦)
Air· hardest: The Doom of Dilmun (4✦)