At which point you say fuck subtlety after the first few of your Chosen get offed and use your power to send down divine servants to counter Bloodravens sneakiness so that it might stop happening. Give them
Cassians or
Iophanites or
Chorals to aid in the tasks that you've given them. Give them access to blessed weapons and direction. Actually
aid them instead of just shoving power into their souls and leaving it at that.
Like, the entire plot when we met Frenly to ransom his brother could have been seriously damaged if what's-her-name the Warrior's Chosen had a Spirit of the Seven like any of the above to back her words up and/or catch the damn Imps.