This was a dilema I experienced myself. From what you heard of the T10 piece bonus with two pieces equipped is by far a handy bonu to have especially if the raid is taking more damage then you would like them to. My opinion is to get the gloves and either the head piece or shoulders, what I did is I got the gloves and shoulders, and man did I see a huge difference in my healing. I suggest you don't get the trinket because the trinket you would want would be the one that Lord Marrowgar drops, Sliver of Pure Ice. If you have any more questions please let me know!