Hi all,
I'm unsure of how useful this is going to be, but I feel like it could be exploited further; currently, if you take the Level 100 Tier talent "Saved by the Light" and use Beacon of Light on a player who is about to duel someone, for every second the dueling player's health is under the threshold (30%), Saved by the Light will proc on the Paladin who cast Beacon of Light, rather than the dueling player. Although you will get the debuff for "Recently Saved by the Light", the shield will continually proc and refresh the 30% shield, as well as the debuff. On reflection, in terms of usefulness technically speaking a holy paladin could effectively tank a world boss with this exploit. From experience of a similar bug with Angelic feather, I am confident this works in the Brawlers guild when used on the player fighting, I guess you could start with a 30% shield.
Proof of concept: (No idea why there is whitewash, sorry for that one)
Edit: I will later test this in a duel myself, while the other player is still dueling.