It's a bit of a weird skill; it gives paladins nothing and being able to hit it yourself wouldn't do much to change that, even with instant clemency.

Rather than changing the activation (which i think is nice, it's a party skill after all), I think it would be better to just have the effect hit the PLD as well. Would let the PLD run more Sword Oath, running their DPS a little higher. Especially since the normal activation is Divine Veil -> Succor for maximum party shield in preparation for big hits.
It'd also be useful to mitigate tankbusters, effectively being an near-instant activation stoneskin, once again letting the PLD stay in Sword Oath more.
Especially with switching oaths taking up a GCD, that'd help a bit with PLD DPS without making the skill more convoluted.