Well, your best bet is to just grin and bear it. I helped my GF's lock get those very bracers, and I believe that she was able to get there with 10 deaths- the important thing is to go in as stealthy as possible. Every time you die, as a wisp, look for a place to rez that’s out of sight from guards and other players- if you can’t, look for a place close to your rez point and aim for it. Once you get past the main guards, you can skirt the outsides fairly well. If you have an 80 that coming to run you through, then have them in-place as you make your run. I was able to nuke a few NPS’s as she approached the instance- and even “occupy†some angry horde while she sprinted in. Just be very careful your friend doesn’t lock himself out of the instance if he’s going in and out.
Good news is, once you have them (and they drop fairly fast) you never have to go back.