(intentionally)
Well, this is a mess. Running away isn't an option – Ginza is alive, Jack is dead, the mission failed, and we achieved nothing. Either kill him or do this. But I don't even know what else he might have besides Baldr's fire; maybe he has a counterattack and 100500 dodges, or parrying, or anything. To be honest, even ordinary, uncontrolled NPCs in the expansions are a pain, and this is even worse. But in the worst-case scenario, I might go for it. Suffering is suffering; there don't seem to be many good outcomes in this game anyway.