I thought I was ready to go to the desert and looked around Kryta to see if I missed any areas and so I did:

Lorenzo Silat (spirits), with the help of a Shining Blade Recruit (ranger), Tahlkora (healer), Olias (minion master with Ward Against Harm), Gwen  (interrupter), Stefan and Alesia managed to vanquish the area of Watchtower Coast within 37 minutes. The foes are mostly composed of Peacekeepers, White Mantles, Mergoyles, and Bog Skales.

The Peackeepers and White Mantles will engage anyone not belonging to their faction.