As a general strategy this is what I would look to do:
Get the three of you to form a nice line across the field, in strong primary barricades. Use your left and right players to control the tapes, your mid player will generally have the freedom to move switching pressure from one side of the field to the other.
What you are looking for is a weakness in the other team or a particular strength in the field layout. You need to hold the width on the field whilst either moving to the strongest position or exploring your opponents weakness.
If you have found a particularly strong bunker through your field walking set you team up with two guy's holding the width and supporting the third to the killer bunker.
If you are looking for a weakness in the other team you need to try and isolate one of their players, either they are out on a tape on their own or isolated in a front bunker. Move your players and paint to enable you team to eliminate them. Once your one up do the same thing again isolate and pressure one of their players to make the elimination.
If you lose a player first or are up against two players remember how strong a crossed up two man defence can be. Don't just go wading in, keep your head!
Also control over the tapes is critical if you can take out one of the tape guy's with a bunker move or run through capitalise quickly raping round to finish the game off.
Control and Aggression simple as!
Cheers,
Alan................