RDM would be better served by adjusting the mechanics of enfeebling and enhancing magic to actually affect potency, not new spells or abilities. You can't build a house without a foundation, and presently RDM's foundation in enfeebling and enhancing is decaying. When a BRD/RDM can do everything a RDM main can do just as well, in addition to all of its BRD stuff, there is a problem, and that problem isn't the abilities or spells RDM has access too. It is how those abilities and spells potencies are determined. A BRD/RDM gets a full 15% haste, it can cap a 29% Slow I and the ACC to land it!, fix the mechanics, then add to the job.