Priest T4 set bonus HoT (Renewal) unaffected by +healing

Currently my T4 set bonus HoT is awarding 3 ticks of 55hp, regardless of any +healing.
55x3 = 165 = 150x1.1

It seems that the Spiritual Healing talent (10% to healing abilities) is the only effect to modify the 150 base healing of the Renewal HoT, rendering it practically useless.

The TBC armor? Im not sure if that’s what you mean, but those bonuses are deactivated