Lorenzo Silat (spirits), with the help of Tahlkora (healer), Olias (minion master), Acolyte Sousuke (fire-support with Ward Against Harm), Stefan and Alesia managed to vanquish the area of Anvil Rock in 1 hour and 36 minutes. The foes are mostly composed of Centaurs, Minotaurs and Dryders.

There are 2 Dryder bosses (Mesmer and Elementalist) that doesn’t seem to use any skills/spells.

There are also about 3 minotaur groups (Northern area of the map) and 1 centaur group (South-West area) doing a long range patrol in the area so if you believe you’ve already covered the map and haven’t been notified that the area have been vanquished, it’s probably due to these groups.