Are either the Break Blade or Onion Shield viable options for Paladin? Neither of the weapons have Parry, but is that a viable reason to not use either of them (Ignoring the obvious that Allagan weapon is BiS)?

PLD will be my fourth job, but since I have spent all the myth on my main (WHM) that I want to (Just waiting for Coil/Extreme drops), I am splitting my myth tomes between SMN and PLD.

Can I use either the Break Blade or Onion Shield in a BiS list(without the Allagan weapon), or will I just need to replace them later and shouldn't waste my Rowena's Tokens?