Hi,
Retr is the last toon I got to 100 and in full 710 (740) PvP gear .. The others are Feral / Shadow / Fury / SV / DK Frost .. Retr is the weakest of them all .. I use the healing ranged body guard on all my toons and every single build other than Retr can easilly keep HP and kill speed up .. Frost is just crazy self healing and Shadow never drops below 65% HP regardless of what I pull and Feral is equally as potent .. Retr outside of Wings simply takes far too long to kill!
Rotation is PvE DPS prioraty ... Again this is only with elites and multiple elites at once .. even Shadow can pull 2 or 3 elites .. frost and feral and fury do it with ease ..