Pretty sure when games comes around to balance issue, the ability to solo a dungeon boss is on the very bottom of their priority list. However, if that is truly your concern, do note that I also thought about future contents when I came up with my ideas. Right now, tanks are already pushing 20k in terms of HP levels, should this idea is implemented a PLD can instantly heal 30 or even 40k+ in one go. It will save your WHM his/her Benediction; which brings out PLD's idea of utility.
Can you explain to me, why would you have my proposed Flash also blinds my own group? As far as I notice, Blind is not such a earth-shattering effect that being able to apply it permanently on a boss merits crippling my own team too. All I see it, it is simply an Accuracy Down. How is that different than permanent STR down or slashing debuff?
I agree on some points about my proposed Shield Swipe. Of course, keeping of the TP cost is implied and maybe even limiting the proc effects that it will only activates while under Shield Oath. I do disagree,however, on reducing its potency. As I said before, the suppose effect only has 15% (adjustable after testing, of course) to activate on a BLOCK. Your " Sheltron, Bulwark, FoF" argument is exactly one of my predicted answer. Even though you boost your own block chance, that doesn't mean you are given a proc. Bosses auto are slow enough that even with Bulwark, the idea is your Shield Swipe will only proc twice (or 3 times if you are lucky) over the course of the duration. As for the rest of the time, the TP cost will be the limiting factor to prevent "proc spamming".
I admit, I do not have too good of argument for Clemency. Personally, I feel it is a rather awkward skill. True, my proposed change is just a "Benediction copy" of WHM, but as I said to Eye-gore above, this was simply my attempt to provide PLD further utility in case the raid group doesn't have access to a WHM. Besides, I won't call "300 sec CD" on Benediction "every few sec".
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Again, I would appreciate further comments about my ideas. And thank you for those offering theirs.