I have a question about the Mindflayer Colony part of Act II, specifically regarding my party size and accessing camp.

Spoilers for Act II below.

Playing on regular difficulty, for reference.

So I failed both the strength and the two arcana checks with Mizora in the Mindflayer pod. She died, and Wyll was killed in response. I am bummed but darkly thrilled by this outcome because character death in this game is mitigated by the abundance of Revivify spells and Withers. This is the closest it's felt to a real DnD campaign from a "stakes" perspective for me (I'm aware character death is not the only way to raise stakes, but I like it!).

ANYWAY, my question is: is it possible for me to beat Ketheric Thorm with a probably-not-optimized-at-all 3-character party of a Paladin, Cleric, and Wizard? If not, is there a way at all of going up to the surface to access camp so I can pick up another character? Or must I save scum, despite how much I love this outcome?

Thanks!