The following monsters are the only ones whose drops will be considered
in each category:
- Hell Baal: Baal and his 5 minion packs.
- Pindle+: The mentioned SuperUniques and their Minions, in the cases of Eldritch, Pindle and Sharptooth.
- Level 85 areas: The Mausoleum, The Pit, Maggot Lair lvl 3, Ancient Tunnels, Kurast Sewers lvl 2, Forgotten Temple, Ruined Fane, Disused Reliquary, River of Flame, Chaos Sanctuary (not including seal boss packs and Diablo), Worldstone Keep, Throne of Destruction (not including minion waves)
Drops from all other sources will not count. This includes Prowling Dead in Pindle's Garden, Chests in the Pits/Ancient Tunnels, etc.
Basically you can choose where to run as long as your running target matches allowed areas. Basically all areas lvl 85 are allowed.
Its been like this since ever, except when Ancient Tunnels were separated category from lvl 85 areas.