If you get offlane, midlane, have little carry potential or are simply fed, then you can go for the semicarry Windrunner build. All it means is dealing a ton of dps (from a distance, a sort of 'shy carry) and wrecking the enemy team who won't see a semicarry Windrunner coming. Note it doesn't transition to lategame carry well, but buys time for the hardcarry to do so, and the dps will still be powerful even if it can't keep up.