Originally Posted by Darth Payne
Huh, i've always gone to 'Dark Fissure' myself.
Fort Istirus is better?
Not better, but easier to get to at lower levels. You will still have to go to Dark Fissure for the Mage's Guild Quest, but if you just want to make some Black Soul Gems, then Fort Istirus
is closer to civilization right off the Gold Road between Skingrad and Kvatch.