Strategy: The marksman ability allows these snipers to pick off enemy stragglers, but even more useful, they can spot invisible units hunting your mages. A Marksman can also see invisible, making them the perfect counter for Shadows that are harassing your units, or Saboteurs that are harassing your cities. Because of their ability to see invisible the Sentry upgrades are very useful for Marksman. They also have the Marksman ability, which allows them to attack the weakest unit in an opposing stack instead of the strongest.