How to make Cryo-Pod Public Event Heroic
During the fight there will be times when the field is covered by an electric / frozen gas. On either side of the cryo-pod there are 2 vents each side. One side will be venting this gas during this time. Shoot these vents to pop them and grab an orb and toss it at the boss. Do this to all 4 vents and you've now activated heroic mode!