So I've taken a break from WoW and picked up FFXIV again, and one thing from that game got me thinking about this one - healer DPS.
In a "normal" raid comp. you have Holy pallies judging Light and Wisdom onto the boss, right? What if instead, they judged Righteousness? You'd then potentially have 3 Rets (one each for JotC, JoL and JoW) ensuring 100% uptime for the raid, all of whom benefit from JotC (and have non-gimped DPS), and the Holydins judging Righteousness for bonus damage (and also additional fun), which again, has synergy with JotC being up on the boss. I'd imagine they could actually do quite a lot of damage if they judged on every CD (or as close to it as possible).
That way, it's not just the lone Ret needing a debuff slot to themselves, you leverage some "hidden damage" from the healers and create a stackable thing. Also, no Holy resistance and bypassing armour = a really good reason to stack Holy damage if you can...
OFC the elitists and minmaxers will scoff, but I think it could be a really interesting idea to try as an alternate comp in a hybrid-friendly guild.