Using self res actually is a huge help for the team. If you die in a bad spot you can self res so a teammate doesn't have to come get you. I've used mine several times to go on a suicide run to go pick up a teammate knowing I will most likely die, but can pick myself back up and get back to safety. I've also used it for suicide runs against bosses that are on their last leg, like -blam!- it I got this.