Anything +/-20 from your skill I believe. Normally use Trogs to 100, and event mobs after. But quick search for 'plentiful' mobs with wrestling in that range include Balrons, rotting corpses, yomotsu warriors, hiryu, etc. Could go run the lich mini champ a couple times; bone knights, rotting corpses, and skeletal liches all seem to be in range-ish.