Didn't you already post this? Anyway none of the shields are going to be absolute game changers. Given your set up I'd run:
On the Legionnaire:
Dirthamen's Wisdom - Paybackstrike / Auto attacks will hit harder and you'll constantly be in the fray so the buff to DPS helps if your team isn't picking up DPS slack.
On the Templar:
Either of the other two. I'm honestly not sure how the Heal 15% of damage taken works though I have it on my Emperors shield. You can play around with the two to see what works best for your playstyle and stress test against different scenario counters. (I.E face tanking Revenants, blocking Demon Commander uppercuts, etc).
General rule of thumb for me is: Survivability shields for Templar, DPS shields for Legionnaire. Logic is that Templar's are more bursty DPS so they don't need the help there while Legionnaire's are more durable so they don't need the help as much there. +ranged defense % too is important to consider since ranged units can shred you from safety if you're not careful.