I used a couple teleports to position Gwynne through the palisade gates. Used a third to teleport the magister Jonathan near the gates and he ran through the gates to fight Gwynn. We wrecked Jonathan and by that time the magister knight got to the gate entrance. Wrecked him there. Pushed Gwynne further away with a teleport and froze him with Cryogenics while the rest of my party ran to finish up the magister ranger. Done. Long as Gwynne keeps that chain lightning on that side of the gates, no issues.
