What should I do with Wyll in Dark Shadowheart Origin run?

This is sort of an evil run, but not the usual type. More like dark and depressing run. No murderhobo-ing, just making sure every party member gets miserable and hates themselves in the end. Just like My Lady Shar would have wanted.

Shadowheart will obviously become a Dark Justiciar, Gale is destined to blow up, and Astarion will either get Ascended or will be forced to hide from Cazador forever (I'm trying to get my golden dice, so I'm not sure if I'll feel like fighting any optional bosses in Act 3).

Lea'zel and Karlach are already dead. Lea'zel stabbed me and took the Prism - which blew her up. Wyll claimed hunting the devil is his first priority, and I liked having him in my party, so I just killed her on sight, without listening to whatever she wanted to say...

So, Wyll already somewhat hates himself because of Karlach, but I'm honestly not sure what should I do with him in Act 3. Should I make him sacrifice his soul to save his father, or break the pact, and let his father die? Both options end up with him miserable, so I guess the question is which of those would DJ Shadowheart think is more useful for her? Making sure he stays a warlock, or encouraging him to take his father's place in Baldurs Gate leadership?

And while we're at it, what should I do with Jaheira? The Last Light Inn will obviously be crushed by My Lady Shar's dark powers, but Jaheirs still survives and could join my party. Should I take her with me and then refuse to save Minsc or something?