Every Core, Support, Duo and Legendary boon ranked for 32 Heat and up.
Data from build 10929685, updated
This ranks all 164 boons Zagreus can pick up, viewable By god (one tab per god, with duos listed under both parents) or By slot: Attack, Special, Cast, Dash, Call, Passive, Duo and Legendary. The calls assume high Heat, 32 and above, where Extreme Measures is on, Elite packs are the default, and a boon that only looks good on paper is what ends the run. Every placement here is editorial opinion built on community consensus and a lot of high-Heat clears. Nothing in the game's files decides any of it. The numbers in the notes are each boon's own Common-to-Heroic ramp, so you can see exactly what a rarity upgrade buys you.
Core boons are ranked against the other eight gods offering that same slot: Attack against Attack, Cast against Cast, Call against Call. Duo and Legendary boons are judged on what they do once you actually have them, discounted for how much setup, luck and prerequisite boons it takes to get there. Support boons are weighed on how often they matter across a full run rather than how big the number looks in the pickup screen. Every figure quoted runs Common through Heroic, so a value like 40% up to 96% is the full rarity ramp. Weapon and aspect requirements get called out wherever they are the whole story, which for the eight Shield of Chaos Flares is most of it.
Each boon room belongs to one god, so start with whoever is offering.