GetAuraIcon resolves buff/debuff icons via C_UnitAuras.GetAuraDataBySpellName (returns the icon directly, no UnitBuff/UnitDebuff follow-up) and temporary weapon-enchant icons via C_Item.GetWeaponEnchantInfo + C_Item.GetEnchantInfo + C_Spell.GetSpellTexture. This drops ~48 tooltip create/scan/hide ops per uncached effect and, unlike the old FindBuff, actually yields an icon for weapon-enchant-named effects. The dead tracking-spell branch is removed, the AddAnimation call site no longer dead-ends on non-matches (falls through to the spellId/Babble/item resolvers), and the now-unused MSBT_Tooltip frame is removed from the XML.
Brues