See, non RDM's making assumptions about RDM.

Here let me repeat myself

At 75 RDM's "buffs" were
Haste
Refresh
Protect
Shell
...
That's it, and the two important ones are both accessible as /RDM. A BRD/RDM can give all the buffs a RDM does plus their own aoe buffs that are vastly superior. A COR/RDM can do the same along with dealing damage from the back.