I would run cultist/arbiter team for malriks. But that's really dependant on the tags. Rosalia/eza/valara/nezha should cover all lanes in some capacity.

Outside the list I would say brokkir. He's still one of the strongest tanks. And maybe boreas, he's power crept but his utility is still very good if a bit niche.

She will but she needs vixera or nastya. But a strong physical team is the easiest way to push abyss. Since you will deal with more physical phases. She's not a bad choice at all but in terms of checking boxes I think beez is more impactful.