Places of power
Changes related to the places of power were done in "blob0.bundle\gameplay\abilities\effects.xml". Look for <ability name="ShrineEffect"> and <ability name="ShrineAardEffect">.
Also find this line in scripts, and revert all changes related to it:
theGame.GetDefinitionsManager().GetAbilityAttributeValue('ShrineEffect', 'duration', durationMin, durationMax);