Almost finished my latest TSL playthrough and realised that the Nihilus/Tobin scene did not trigger. IIRC it should've been right before entering the rebuilt enclave... so now I'm wondering if there are any requirements or if some mod conflict screwed this up...
I did the DS Onderon path and that was also my suspicion but then Tobin showed up on the Ravager (more or less alive) and talked about this scene. That was what got me wondering if something went wrong^^
Odd. I think he appeared in the cutscene on my Dark Side run, but he didn't appear at all on the Ravager. Could be an issue with Extended Enclave, but I'm not sure.