I used to think I might get away with something like a Dark Urge Warlock but no, the game very strongly pushes the Dark Urge to be a Rogue Assassin as his patron. We know the first item you get from the dark urge origin story and it's an insanely powerful cloak that is 1,000,000% intended to be worn by a rogue. Other classes could technically make use of it but far less efficiently. So I think it would be far less ideal to be anything but a Rogue Assassin when playing the dark urge. You could play the Dark Urge as another class but then you'd have to hand the insanely powerful Rogue gear obtained by the Dark Urge to Astarion or maybe a rogue hireling or not use them...all terrible ides.
Maybe in the full version of the game there are more variants of that cloak.
It would make sense, since Dark Urge is a custom character and it is very difficult to design an item that has the same level of utility for all classes.
