The Scout is one of the best air units in the game for one simple reason, Scouts have incredible air to air fire able to pump 28 damage into an air enemy an then only having to wait about a second to fire again. the Scout works well alone but with a squad of these you will rule the skies. However, like all good units it does have a flaw, it's ground gun can not hurt a whole lot so using Scouts against a Spore colony would not be a good idea. The Scout is built at the Starport but you can upgrade it's speed at the Fleet Beacon, which I suggest you do.