Your reasoning for why Error could be a doombot seems odd seeing as they would KNOW if the scry was happening N1 or not. That said it is interesting of why Raptor bolted Smile and not Error. The only advantage they could get from bolting Smile is that they have players on their team which don't have night actions so shouldn't be able to visit people at night.
Thor targetting Smile, in my opinion, is just them being safe. Say, Smile happens to find the bot that deals the deathblow by chance. That's almost guaranteed to kill one of their own. So going with the safer option, they targetted Smile.
Doombots killed Mantha, Loki killed Raptor.
I'm interested in this. Wasn't the one who killed Raptor, via her skill? Because I assumed it was as such. Also you're referring to Ultron not Loki. Is this a flag I wonder?
I say, with Smile getting stunned by a doombot and Error's report coming out positive, I think we can be sure that he's a good guy.