Blah, decisions decisions.
Acc+10/DW+3 would be a pretty sick TP piece for NIN, but Enmity+5/Fast Cast+5 would be likewise crazy for tanking.
Happy that I don't have to be conflicted about which job to pick for the body... SAM is much better off with Haub+1/Askar(on weak stuff)/Usu. RDM doesn't really benefit at all provided you have a decent selection of endgame bodies.
However, leveling RNG does make it tricky...