Those are certainly good points, but I don't think entirely necessary. My suggestion has the spells as self-target only (like Sanguine Rite) so when Sacred Prism is used to make it aoe, it can only be centered on the RDM. The buffs are also very melee oriented so there isn't much reason to be hitting back line jobs with them.

Discussion is good, because regardless of how each of us thinks our own particular build would play, someone else may have a different opinion. And if someone finds a way to exploit something about your build that would force it into a role you don't actually want to play, you better believe that's the role RDM will end up playing.