To be honest I would be happy with Ward simply nullifying damage from the other supers completely then going out. I prefer to stay in the bubble and serve as a distraction to the enemy and giving team members a chance to pick them off whilst distracted or simply a safe reprieve. Since certain other supers will not only bust your bubble they also kill you and anyone inside it makes Ward dangerous to take cover in because of the attention it attracts and the possibility that your attempt to help ends up luring your team into a false sense of security while you may just be giving an enemy the opportunity to pull off a nice multikill