martyrs could make good candidates.
Aka people dying in a defensive holy war (preferably in a big defeated battle, if we can measure that), people captured and then tortured or executed when in ennemy's prison.
Martyr would be a new trait gained in such circumstances. This trait givin better chances to be received as saint.
You could trigger a check for whether someone gets a martyr trait in the battle event which kills them, or upon on_executed firing.
I even made an icon for this very thing, in fact.
- 2