There's also the GM method, which I think is only in newer releases:
1. Set up the game, including all bots, in the lobby. I believe all bots have to be on different teams from the human observer.
2. in the game options, find the "GM determines turn done" option (on phone so don't recall exact name)
3. In the chat text entry line, type "/gm" (minus the quotes) and the human player will become the GM automatically
4. Now the human player has to click "Done" at the end of every phase to continue.
Typing "/gm" in the chat box in the game will turn this off and the game should go back to fast mode.