Yeah, I'm a bit lost on talent choices, I already tried to convince him to take Ysera's Gift instead of Renewal, but I guess he wasn't that keen on using it.
Before using DoC, he was running around with HotW but normally never used the active portion of the talent. In general, I don't really think that he's paying attention to what's going on the raid, so DoC should be wasted on him, right? The way I understood it, DoC is quite a good raid utility talent. :/
Regarding using tank cloaks and Renewal, if there's a fight with huge damage spikes and the chance of getting near-globalled, both have legitimate uses, right? But even if this is the case, this doesn't really feel like something the priest has to tell the Guardian tank on every fight, telling him which gear to use, which talents to choose.
Thanks for the help so far, keep it coming if there's something to add.