- Summoned NPCs will no longer give experience on kill.
- Require quests Fel Spirits and Digging for Prayer Beads to be completed.
- Reduce number of Foul Purges spawned in a single wave (only two should spawn each time).
- Properly give quest credit when talking with Colonel Jules after the exorcism.
(cherry picked from commit 0d70a7349d7b245adba72f9a15410a5b3d22dc77)