Do not assign any profile, just make it hide that ugly helmet in Party set.
/script AddGearProfile("Party", nil, false)
Equip set. RatingBuster profile will be changed as well.
A thing to keep in mind.
If your specs differs drastically (f.e. Ench/Resto shaman), it won't help you
fully understand value of a gear piece with stats that affected by talents
(i.e.: Intellect contributing to AP/healing) without actual change of spec,
but it will at least help you quickly decide if you should roll on it or not.
Loot master usually won't wait for you to change specs...