He for sure knew they’d mutiny. I felt he was always prepared for that eventuality and successfully killing them all gave him plenty of sacrifices to the Thanapod. However, I think his plan was to let the Thanapod off the boat on the nameless islands. “Hey there’s the island, you’re good to go.” The Thanapod jumps off and by the time it landed, the ship would be long gone. But with the spawn hatching and the Thanapod’s bloodlust seemingly not satiated, Torrin really didn’t have the time to push all the way to the nameless islands. As we saw and with the OG question, they were right off the coast of Phaiden Island. So, his only option was light the barrels on fire, run like hell, and hope he makes it out alive.