there is a legendary gem.... there are alot of mods you cand do to an item, add life points, regeneration points....
as for the sockets, alot of confusion as to how you can keep a barbarian from dying with no offensive . there are cube options , for
leap, or furious ragethat enables 80% of damage to be removed for 8 seconds...there is a cube options to heal 4% of life per hit....
alot of damage comes from element... a white gem in a sockets can help absorbe that...
some skillls help survive through hits that would usually kill a barbarian too...

seems like nooobish start, best i can guess...
some leachers can last a long time on that , i guess...