Is this shield worth looking into for a PLD?

I do not have the Onion or Allagan shield, just the Holy Shield Zenith. I am aware that the High Allagan shield is BiS (?) but thats a bit out of reach for me at the moment.

Should I go spend the tomes on the Weathered Noct shield and eventually upgrade it, or should I look into other options.

Thanks for your input.