Engineer Strategy
An Engineer's strategic focus is Sentry Placement. In general a Sentry should be able to automatically target any enemy coming into a base or controlled area. Engineers equiped with a Wrangler should also consider a location which provides a view of long range entrances into the area, but without a wrangler a sentry should be placed so that Soldiers or Snipers cannot target the sentry from a distance.
Dispenser and Teleporter placement also requires some strategy. In general a dispenser should be placed where teammates can hide, heal, and refresh their ammo; however, sometimes a dispenser should be placed near a doorway so that a Heavy Weapons Guy can shoot out of the doorway with unlimited ammo. And, a teleporter entrance should be placed near the team's spawn and the exit placed as far as safely possible near the team's goal and pointed in the direction where teammates should be moving once they exit the teleporter.
