Re: Best place to farm t5 (black ash, ancient iron, exceptional hides) at the same ti
Eastern Angmar, Eastern Misty Mountains, or Northern Eregion.
Eastern Angmar is off-limits unless you've completed Volume 1, Chapter 6 of the epic quest. But the other two are fully accessible to a carefully-played level 20 character. In my experience, Misty Mountains tend to have more ore, Eregion has more wood. But that could just be some sort of perceptual bias on my part. Both areas definitely have all three materials.
If you don't mind missing out on the wood (and wood is usually the first material I stop gathering at any crafting tier), Forochel has plenty of hides and ore for the taking.
Dwarf Guardian, Hobbit Hunter 65; Elf Rune-keeper 55; Elf Hunter 49; others 7 to 36.
Two of each class; 3+ of each of the ones I like; 8 x KSM and counting....
Asheron's Call'99, Dark Age of Camp-a-lot'01, Everquest II'04, Vanguard'07, (M)Age of Conan'08, Lord of the Rings Online'09, Rift'11.