With the Celestial Obedience feat and Vildeis as the Empyreal Lord to worship I'd get this ability at level 20
Martyr's Blood (Su) You are immune to bleed effects. Whenever you would be affected by a bleed effect, all enemies within 30 feet gain the bleeding condition instead as though they were the effect's original targets (no save; creatures immune to bleeding are immune to this affect). The Heal DC to stop this supernatural bleeding is 20 rather than 15.
How would this combine with the Holy Vindicator Stigmata?
Would it fail to activate as I'm Immune to bleed or it will activate inflicting the damage to the surrounding enemies instead of myself?
I think the interaction would cause all enemies within 30 feet to start bleeding while you still gain the sacred bonus on the chosen type of roll. Kind of powerful, but for a 20th level ability, I think that's okay.
5 bleed on monster's hp pool is like a drop into a lake, 90% of the time you don't even have to keep track of it since PC are swinging for 30 up to 50 per hit.