The only smartest way is only using martingale with little luck to earn some profit and you need to manage on how much your balance is and how much are you going to use the base bet. If you can manage well I dont think that you wont get some profit because AFAIK you can still get some profit although you are playing it in a long run
The smartest way is just to pull out yourself from gambling addiction and just play it occasionally.
This is the best way to win in gambling, Just stay away from it and dont intend to play too much money on it so that you wont lose up too much money in you savings. Martingale is just a classic strategy which have been busted already by gambling sites its not recommended on autobets which you would definitely suffer from long lossing streaks.