I recently went back to my Holy Paladin.
I have messed around with the DS stats (Haste>Mastery) then I messed around with Mastery>Haste and I felt like I got higher numbers and healing throughput with it. Plus I was able to keep my mana up It was just LFR testing, but My illuminated healing(Shield) Was my top heal on both stat weights. I decided to go to Mastery because it would increase the shields even more and hopefully help more during AoE damage.
Anyone else has the same ideas or can give me an explanation on what you do?