Basically you go for a three swords start, though you should scout with your first sword to confirm the treature start. You'd be kind of screwed if they got an air.
After your first two miners finish their first batch of gold get a third miner. At this point the treature will be set up. Then spam swords until you have at least 5 swords. Attack the treature and ignore the scorpions, maybe one of your swords will die (maybe more if the other player micros the scorpians really well) but it will not matter. The treature will die and you end up with a larger army and better economy (if you take the tower). There is no need for rage. Also, this is simply a start that counters the treature start. Macro-wise this is a terrible idea, DO NOT USE IT FOR THE ENTIRE GAME. Afterwards I like to transition into sparcher with three or four shadows by end game.
This obviously doesn't work all the time, but I've seen it work in the 2.1ks (actually, the 2.1k went for a 4 swords start on GH), if you're any higher then it probably isn't a good idea. It works for me in the 1700s too.