Originally Posted by
Eab1990
A lot of G maps (maybe some X maps too) have early goblin archers, and thus you don't have the luxury to drop an expensive tank early, especially if you need to save them for something bigger later in the map.
That mostly applies to blind runs though. Still, if you know a lich is on that map, then naturally you'll put ranged units down first, and that sometimes means putting the archers in the line of fire alone until you're ready to bring out the healers/tanks. AW Bashira just circumvents the need for an early melee tank.