Did the Nightfall with a randomer I picked up along the way - that was the only way I managed to complete it despite 'cheesing' as on Solo, the nexus attack is constant. Non-stop! With the randomer, we took turn to from either end of our hideout to get rid of the Nexus.
On Weekly Heroic, it's a lot easier as the Nexus flinches, so it gives you respite whilst sniping his crit spot.
On Weekly Heroic, it's a lot easier as the Nexus flinches, so it gives you respite whilst sniping his crit spot.