I always try to make Demonis my next shopping spree after finishing Korador.
The bridge fights can be nasty - Last time I was facing off against like 200 succubi and 70 demons - 70! do you know how long they take to die
Some players roll Beshaba's black dice, Katana the uber powerful villain from Demonis sometimes steps out for a walk at the demon gate!
Get through that and it's shopping city, knights (before they hit horde), nercos, ancient vamps and of course succubi
and the best spells...
Managed to sneak my way completly through demonis to Baal's fortress (Put Obi Wan to shame) some great stuff to find.
But that said, when it actually comes to invading, Demonis is very difficult for a mage with all those high fire resistance mobs and the two castle seiges, made me start a new mage and doctor frog girl's tadpole spawning list (I was using living dead girl the whole previous game)