Priest · Holy · tier 1 · from level 10

Holy Specialization

+49.0 Greater Heal

5/5 · level 60 · per cast · and 14 more

Holy Specialization 12345

Rank 5/5

Increases the critical effect chance of your Holy spells by 5%.

Greater Heal +2.5% +49.0 Binding Heal +2.5% +42.1 Divine Grace +2.5% +35.0 Penance healing +2.5% +31.9 Flash Heal +2.5% +21.0 Renew +2.5% +20.8 Heal +2.5% +16.8 Prayer of Healing +2.5% +16.2 Prayer of Mending +2.5% +10.3 Holy Nova healing +2.5% +7.8 Holy Fire +2.5% +6.8 Penance +2.5% +6.6 Holy Nova +2.5% +4.5 Smite +2.5% +4.2 Lesser Heal +2.5% +4.2

Averages, counting crits and misses, for a level 60 Priest with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.