Ret AoE is weird, yeah. Rather than adding a straightforward AoE like Consecration, I feel like Rets should get a new version of Humans' old Perception. Name it Eyes of the Law or something justice-y.
3% of base mana
1 minute CD
Use: Greatly increases stealth detection for the next ten seconds. Casting with Holy Power lowers the CD by 20/40/60 seconds.