I have played this a couple of times. Last time we played was at 400 pts without any side plots. I play Indian Nations and my mate plays British. I had slaughter and my mate had Scout. The pressure is on for the player who has the Scout mission but the game wasn't an instant win. My mates British force had a unit of Indians and a unit of Irregulars with two big units, one of Grenadiers and one of Regular infantry. Apart from coming pnto the table piecemeal, he still managed to deploy his regulars in a firing line that helped with village defence and sent his Irregulars across to scout on one side and his Grenadiers to scout the other side. The chief reason for my success was that I had three 4 man units armed with rifles in woods. These could provide a good firebase to keep his units pushed back/dead!
These rifles were the only thing that stopped him from scouting the final section of the board and it has to be said, we were still getting things wrong in the game that would have allowed him to take more shots at me than he did due to us not being fully up to speed on things like the spotting modifiers etc.
It was still a good game and I think with a bit more practice, it will become harder for me to win.
We have tried the Scout mission at small point games but this didn't work as well as you don't generally have enough to soak up damage and get your scouts back off the board.