Description
Gives you a 23/46/69% chance to avoid interruption caused by damage while casting any healing spell.
Position confidence
row: Confirmed (talentsforever.com JSON + foreverchanges.pro tier listing); column & arrow: Reported (explicit only in talentsforever.com data/shaman.json)
Change notes
Classic: 5 ranks x 14%. Rank 3 may round to 70%. Only some ranks were read from footage; other ranks follow talentsforever's linear scaling (scaleIdx).