Do you mean Raphael when you say cambion? Because he only appeared once for me and never got a chance to make the deal. And as with the rest (including cambion), yes i can do those things, but the question is WHY. Even an evil character (smart evil character) would not make a deal with raphael. Why would he/she? You're trading your soul essentially and that is all the Cambions, devils etc deal in. A evil character is selfish, they won't make a deal that jeopardizes them. In the same vain, yes i helped the Goblins, but storywise it makes no sense for my character to do that. We are never enticed into doing it except because my character is just...bloodthirsty? For the sake of twirling mustache evil? The main focus of the storyline is pushing for a healer, the best one being Halsin so why would an evil character who cares about themselves first and foremost not want to do w/e it takes to help Halsin to get the help they need. The character needs more to go on to be evil and side with goblins.
I did that quest by siding with the goblins and i killed everyone, in the end nothing about a healer happened, i lost a companion bc he didnt want to be with me (which is fine), but i also didn't gain anything. No new power, no amazing loot given to me by the drow, she didnt join as a companion, i got nothing. Like I said, im curious to see how that story goes, it did a decent job of making me want to see what's next but not my character. Our character is not told why we should care about The Absolute or what it can do for us. Even the "evil" companions want healers to get rid of the tadpole except Astarion. Your points about "goblins serve as distractions" means nothing. It's just you making up story of what they can do. It doesn't solve the issue of why the character should follow them in terms of story. There is no "keeping everyone focused on other threats", there is no system like this in the game. It's very basic 1 for 1 right now.
I think a smart evil character can make a deal with Raphael. A smart NE character will pay with someone else's soul. A smart LE character will make a deal with Raphael that can never actually be collected on because rules lawyering. Ever read the "Children of the Nameless" MTG novella? Think "You can have my soul if I don't die before I turn 65." While the character plainly knows that they have previously died and thus the devil can never fulfill their end.
