Idea: Instead of trying to revive someone in a swarm of mobs, kite them to an empty area, then run back to revive your downed team mate. The area will be clear.
I agree it would be nice to have a solution to this problem, but I don't think it's very high priority.
It is ridicules when you are in a swarm of enemies and you have to go and revive or be revived that you have to go in with an action button to hit, because most of the time then the auto aim kicks in and you end up hitting an enemy instead of reviving the person. If you go in there with your shield it makes way more sense you are protected and it goes faster too you know that your shield is us because it glows blue also. When you go to a person you think you hit them but most of them time you don't when you are in a hectic battle. Plus he is right about the people knowing they are not going to die trying to save you also. Especially in an arena because the last round is just chaos and the people end up going around a few time before they can revive a person so you are just laying there.