Moonwell Chalice, for holy, for sure no. For disc it could be really good for a fight like Baleroc.
Jaws of Defeat is really really nice!
As a disc, with jaws + shard of woe + PI + inner will => 3k mana shields.
But I agree, that the trinkets are quite stupid. I don't like a trinket with spirit + intellect on use; they could've made it like intellect + spirit proc so all the healers could use that.
I'm only using the Eye of blazing power only when I'm tank healing; I find that proc useless.