Why do you need to teach any of these civilizations fire and toolmaking? These are pre-civ capabilities. Toolmaking is natural for the species you even not considering being sentient. Like birds for example. Usage of fire is somewhat different but it would be learned naturally by the any sentient species.

Also, where are the probabilities for mass-extinction-event-volcanic-eruptions are coming from? It looks like they are very likely to happen ... I have 8/10 so far...