Idk I feel like you can pick any class and tell any story, as long as you’re willing to think creatively enough about it. Like, if someone wanted to START as a Paladin of vengeance, then they could tell the story— and this is just one example—
that their Durge passionately swore vengeance against Orin, calling out to Bhaal, while trapped breaking their fists against the pod that you find in the mindflayer colony (Act 2).
And then down the line, they wake up with this oath of vengeance, and they don’t remember why they swore it, or why these thoughts of vengeance are swirling around in their head to begin with. One of the first options you can choose as Dark Urge when you wake up on the nautiloid is to curse those who did this to you. You already have the subconscious desire for vengeance, canonical in the game.
Alternately as Dark Urge,
you could have been a straight-up Paladin of vengeance for Bhaal. A bhaalspawn has to have a class in-game, right? So why not be a paladin of vengeance as the Durge in their previous life.
And yes, you wake up and you have this oath, and you don’t know where it came from, but unraveling the mystery of the existence of that oath is part and parcel of unraveling the mystery of yourself!
And then, perhaps, on the journey through Acts 1 and 2, the (resisting) Durge could suspect that their power might come from this, that, or the other deity, or want to make a vow to a deity who can help them resist the urges. Maybe they want to reject whatever mysterious being empowered them in the past and turn to a new deity for power and protection. And so there can be a transition, from one type of paladin to another, if you wanted to re-class the paladin, and what type they are. So basically what I’m saying is, the only limit to what you can do with the Durge is the limit of one’s imagination. I’d be hesitant to shut down anybody’s ideas.
Thanks everybody for your responses! They have been helpful, for sure.