So I've found myself wearing two on use trinkets. with my holy build On my dps, when I have on use trinkets, I just have them bound to whatever my basic attack is and they go off automatically during combat whenever they're up.
I can see how you might not want that on healing- but I forget to use avenging wrath even. I could see me just never using them if I don't have them bound to ... something.
How do you use your on use healing trinkets? Do you have a macro to use them with your heals or judgments or whatever? Do you keep them on your bar?