For reconciliation to work,
1. both parties have to admit to themselves that their lives would be better together, especially with a daughter at play, even if they don't forthrightly admit that to each other right away.
2. Elisabeth can't be brining in 3rd parties threatening and pushing the shit out of Styx when things don't go her way.
3. Styx will probably have to resolve whatever issue, or come up with a better way of dealing with issues he may come up with. Substance abuse with zero way to get it back under control is no way to raise a daughter. And Styx has already proven that he back slides. I wonder if there are infidelity issues at play, or partners skating too close to cheating. They will probably have to call their time apart and what they did with whom a mulligan.