Yes sorry, I DID mean to place this in Feedback, I probably had multiple tabs going at once. Whoops!
Most boss missions take 8-15 minutes, all of Council's missions take 24+ minutes at the fastest, from my experience.
But my point in posting this is that solo mode tends to be easier due to lower health pools, things die faster. Schneider is the best choice for this mission. When the best tool for the job can't get the job done in a reasonable amount of time, there is something wrong with the job. Insane solo should be challenging, but there shouldn't be any mission in this game that takes an hour to beat. There is a balance issue there.
Ironically this mission was my toughest antag one ever, and I fought a raider team for possibly 45 mins to an hour before finally winning.