I think you shouldn't be able to do this:

[Linked Image]
(It's also possible with strategic retreat)

Jumping over there you can access the chest and use the trapdoor which lets you end up in the small locked up part of the cathedral. The melee minions there can't attack you but you can shot them just fine.

Furthermore you can trigger the stone warden dialogue from inside which seems quite ridiculous as they argue with you that they won't let you in laugh.