In trying to get practice for the upcoming 9v9 TF2 competition, I'm interested in seeing if there's any insight on how to play a spy against a lower number of players. Spies tend to work better the more chaos and confusion there is, and additionally work better when there are multiples of the same class playing.
In the upcoming competition, it will be strictly 9v9 with 1 of each class per team: no more, no less. Being used to playing spy on 24 (12v12) and larger servers with little to no class balance, this is kinda foreign ground and, to me, seems like a much higher degree of difficulty compared to the other classes scale for the competition.
The only thing I can think of is the relative power of the Cloak and Dagger in this scenario, and the benefits of certain maps. Does anyone have any links to tips for playing spy vs. lower player counts or tips that they, themselves, can provide?