Without DXVK game doesn't start, so I can only get a trace with DXVK, could it be useful?
Since that is your only option if it doesn't work with wined3d, then yes.
A trace of Dark Souls2:
https://drive.google.com/file/d/1C37JOjaF1mSyx5DFjW9hJVZpZD13Z0YW/view?usp=sharing
Works fine on my end when using latest mesa-git. This game runs into the same issue as Final Fantasy 14 (see #208), which was fixed I think shortly after you reported this issue.

Yes it fixed this problem.
Game after starting "New Game" is very blurry and dark like described in :
https://bugs.winehq.org/show_bug.cgi?id=42452
Software information
Dark Souls 2: Scholar of the First Sin
Default settings
System information
Apitrace file(s)
Log files