The wild dwarves of the Aerie Peaks have once again responded to the call and brought their mighty gryphons to aid the besieged Alliance in its time of need. Armed with their trusty, lightning-powered Stormhammers, the hearty dwarves seek to keep the skies of Lordaeron free from enemy forces. The proud gryphons share their riders’ implacable resolve and stand as noble symbols of the Alliance’s fortitude.
Gryphon Riders are typically used as supporting units with an army or players create a bunch of them to surprise the enemy as they did in Warcraft II. If the enemy for example has a bunch of Huntresses and no Archers they are in a position to be weak to air units. If you create 2-3 Gryphon Aviaries and create a group of Gryphons you can catch the player without any defenses. The key is to not let the enemy know what you are up to. To do this you can hide the Gryphon Aviaries or at least try to hide the Gryphons until you have a bunch of them.
Gryphons can be useful for hit-and-run attacks on enemy expansions. Take advantage of trees and water to hover over where ground units cannot reach them. If you have to run, run to areas that ground units cannot reach or to the safety of towers.
Don't build a bunch of Gryphons if the enemy has a lot of ranged units waiting for them. If the enemy has a lot of Crypt Fiends it's not wise to use Gryphons against them except in a hit-and-run manner. Gryphon Riders do splash damage.