According to Wales and London Irish scrum-half Warren Fury, the strength in depth in the Welsh side will make them extremely tough to beat once again.
"We have a very strong squad," Fury told Virgin Media. "A lot of the boys who won it last year are playing this year and we showed by the performances in the Autumn that we're going from strength to strength.
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"The squad also has a lot of strength in depth and a player who can come in for another one is just as strong."
Wales are blessed with some of the best scrum-halves in world rugby, with Gareth Cooper, Mike Phillips, Dwayne Peel and Fury himself all competing for the same jersey.
"You have mike Phillips playing well coming back from injury, Gareth Cooper playing very well off the summer tour and in the autumn and you can ill-afford to leave out someone as valuable and experienced as Dwayne."
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