I find the fortresses a lot more enjoyable in DKS, but that's my experience of course
Yesterday I've tried starting that battle in the Ministry, but Astrid Zola is just 1 or 2 levels too low for that battle so she gonna do further other area's first.
At the moment she's in the Sinister Cave* ....
.... for a "meet & great" with Barnabus
* enemies with level 22, so sure the jumping puzzles in the cave are way more dangerous to fail than getting killed by an enemy!