Yep.
1. Summonings to use as cannon fodder. Try and isolate some of them as one on one they are very difficult and they can all use Power Word Kill so make sure guys with low HPs are out of the frontline.
2. Area of Effect spells and disabling spells.
3. Use the terrain to your advantage by luring them to the narrow bridge to the east where they can only fight you one at a time.
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