DE: For the necrofire/respawning revenants, I found Bless for the ground necrofire mostly useless. Instead I used Tornado as much as possible before starting the fights. For the first area I had 2 characters with Tornado (one from the staff in Kemm's Vault), one of those characters also had Cloak & Dagger which meant I could sneak them into the middle and position so that a tornado cleared the room farthest from stairs. Second tornado-er started the fight by clearing the area nearest the stairs, second one followed, while other 2 party members stood around downstairs. This took care of the necrofire on the ground, and then I used rain/water and bless directly on the revenants to take them down. Without rain they would do some crazy things, including in one case respawning on the other side of the locked door below. The entire system of respawning here makes no sense. For the second area, through the first locked door, you can tornado clear the entire upper left alcove with a tornado from the doorway. There is also a small area on the stairs, a little more than halfway up, where you can tactical retreat and make the encounter visible but not engage, which is handy for positioning if you can figure out where to land. I did it accidentally - a pillar blocks the line of sight of the mob at the top of the stairs.