Search for a team called Poli 21. They have lots of excellent players who are very cheap, and they score quite a few goals.
Also, try the following players:
Kevin Doyle (Reading)
Robbie Keane (Tottenham)
Kasper Schemichael (Man City)
Elano (Man City)
Create a custom player and add them to your opponents team.
Select 'Quick Tactics'. Set all of your opponent's players to attack. Place an arrow from the goalkeeper to the striker.
You should win easily.