I will clarify the question regarding low level golds....
In "Post" only, Level 12 foes are the lowest level that can drop golds, this is the only level that can drop q3 golds, which are very rare but still possible today, both Insc and OS.
Keyless chests in "Post" only drop Purple items. These are the only chests that can still drop OS purple versions of skins that are known to be prenerf for golds (Crystalline Swords, Dwarven Axe, Serpent Axe (Tyrian), Krytan Axe and Dwarven Hammers). There is also a rare chance, nearly impossible but possible, to get a purple q8 Magmas, Eternal and Summit shields.
Lastly, Gold items (other than charr salvage kits) do not drop in "Pre" as of today.