AD seems to mostly use Rawl'kha in Reapers March. Everything (bank, crafting, stable, merchants) is really close to the wayshrine so you don't have to do a bunch of running around like in other towns.
Sometimes I have to go to the Hollow City to hit up the grocer there but otherwise I can find everything I need in Rawl'kha. Zone chat is usually also full of people selling higher level items there too, so I agree with @Aeratus that it is the capital of trade for AD.
“Attention Zenimax: Stamina builds don't hold up to magicka builds, and this is causing most of your class imbalance. It makes melee weapons and bows weaker than staves and class abilities. It makes medium and heavy armor less desirable than light armor. Fix this imbalance, and you'll address most of your balance issues.”