I've tested this with my cleric by equipping three items that all provided +10% healing on an ioun stone. In theory, I should have seen at least a 30% bonus in my healing ability. There was no apparent difference.
Agent of the Divine feat is worthless because of a huge bug. The Gift of Faith takes 4-5 seconds or more to heal the person after they drop below 45% health. The person (usually me) is dead long before the gift kicks in. The feat says "immediately heals." FIX THE DESCRIPTION OR FIX THE FEAT!!
Agent of the Divine bug Gift of Faith says it heals immediately. This is WRONG!!! I've counted several times and it takes 4-5 seconds or more for the gift of faith to kick in after I or one of my party drops below 45% health. This makes this feat almost worthless as I'm usually dead before it heals me!! Please fix this.
I can't find the Glimmerstone Mine. Where is it on the map? I had to accept a different quest that had me go to the Glimmerstone mine and not be in a party for this quest to work. I also had "Exit Mine" stuck for quite a while and had to accept a different quest for the silver mine to finally complete this quest.