Both rdm and Sam are OP. Nerfing them might not be needed (though, Sam could use a tick more punishment during mechanics). Rdm is ment to be easy, .. but Smn should be on paar dps wise, if not even more at least in aoes. Blm should clearly be above rdm and on par with Sam it's "twin - no utilty" dps, if not even more than Sam (Sam still has the slashing debuff).

Tldr, buff the other classes more, .. and make Sam (and Rdm) just a tick more punished not "nerf their damage". Rdm would still remain "easy", but not to the point, it's not fair for other classes.