Hunters can go invisible, thus putting all the aggro on everyone else. In my experience a lot of hunters (not all) will use their invisibility and not try to help the teammates behind them by turning and shooting. Warlocks are also good to an extent because of double solar made and self res when necessary. Titans can do their fair share with 5 beat pulse grenades and aftermath to keep the team safe. However if you want this section to go smoothly, you will always help the teammates behind you. Trying to solo then dying to ogres is just a waste of everybody's time.