It does sound quite interesting yes, but how does this benefit the party the RDM is in? All the buffs the RDM generated from ws`s and magic would benefit only the RDM and nobody else? I think it would sound more interesting if they were to enhance the PT not just the RDM.

They still wouldn't be a match for any real DD so PT`s won't substitute a DD for a RDM unless you have something else to offer.