So, I see a lot of threads about MND vs PIE, etc. etc. Or what are the stat priorities for Sch or Whm and I see people include the stat Determination in their priority list. I think I might be missing something or don't understand what this stat does. After searching the internet, the stat increases damage output and healing received... not healing output. I did some tests with my gear with and without determination and my HP potency in fact did not go up with increased determination.

Can someone explain to me why Determination is on almost every piece of healing gear? Why are healers including it in their priority stat list? I have a pretty strong feeling I am completely overlooking something.