Spell Skills have (12-14)% increased Area of Effect

EquipmentSuffixData: patch 0.5.5 Forbidden Rites

From the Genesis tree.

Stats
Name	Item Level	Stats	Spawn tags
of Understanding	69	Spell Skills have (12-14)% increased Area of Effectof Understanding · genesis tree caster	genesis tree caster
of Experimentation	48	Spell Skills have (9-11)% increased Area of Effectof Experimentation · genesis tree caster	genesis tree caster
of the Stars	45	Spell Skills have (10-15)% increased Area of Effectof the Stars	—
of Analysis	23	Spell Skills have (6-8)% increased Area of Effectof Analysis · genesis tree caster	genesis tree caster

The game files don't include roll weights, so this site shows no odds.