There are 2 full sets for each class. Each class gets mini uber from class soulstone + standart of heroes from uber tristram. In this version bloodraven drops random class soulstones in hell. Those mini ubers are not very hard except for druid and sorc versions, druid boss has that fire ring proc, sorc boss has resistances debuff and insane fire dmg. And they all drop one set part per run. Find item works on some of them
For barb - yes, same location in act 5, looks like abandoned ancients quest area.
http://ros.freiik.de/itemdb/sets/ sets info under Uber sets. But i already compared and some stats are changed.