"Increases the amount of healing and the value of [Shield] buffs placed by this Champion by 10% if the target ally has 40% HP or less."

The way this mastery is worded is confusing and needs to be corrected and/or updated so we know what it really does. Does it mean that the increase is ONLY applied to [Shield] buffs by the champion that also happen to heal? What do you mean by shield buffs? The blue and white icon with the little shield listed under the buffs/debuffs list? Or does this increase healing by 10% AND shield buffs by 10%? 

I am asking this for my Doompriest champion. Her Bolster [Passive] is not a [Shield] buff, or a buff at all, but it does heal. She passively heals her teammates by 7.5% of their HP. Would that mean that "Healing Savior" has no effect on this ability? Or does this mean her Bolster now heals for 17.5% when the ally is under 40% of their HP? 

I think you guys really need to make a Mastery Guide that explains all of this in detail and maybe provides some examples. Thanks.