EASY WAY TO FARM ARCHDUKES and LEGIONNAIRES
Jus start up the Hard survival on the island on the right of the map by the Forge IIRC, Two legionaires spawn as well as one archduke, do ONE at a time, go for legionaires, kill them both then start and exit and repeat, when u wanna do archdukes, start it up, kill it but NOT the legionaires and then exit and repeat til u have it, got this done really fast, way faster than getting max notoriety over and over