"Mirrors"

Well, that's just a minor thing. First, it's not the third, but the fourth upgrade, because you first upgrade the Gremlochs...

But I disagree. I'll use a basic strategy, but in a mirror match, it can be very effective. It originated in World Tree, but it's also very applicable in Heroes. You start with Josephine, build a 113 structure, and you're ready to take the Hive, giving you a tempo advantage over your opponent who upgraded Gremlochs to 111 according to the standard strategy – a whole day's advantage, which in a mirror match can mean a win.