On my Legendary run, I went in there with a Nerfle filled with all four extra clips, and used that to tag the Hunters from the balcony where you enter the club. Every time they turned around, I'd nail them in the back three times for a super combine or two, then pull back when they fired on me. They'd then get distracted by the NPCs, and I'd come back for a few more rounds. Four clips later, I had three dead Hunters. The 4th dropped to the rockets in the center of the dance floor.
I spent 15 minutes dancing with those guys on Heroic. Which, given the setting, was entirely fitting. :lol
I love the New Alexandria mission, but I wish the infantry encounters (the Hunter and Drone ones) were a bit longer.