In the start select your miners and make them gain gold (that help you to gain gold early) at the same time you train an air element (press 3 to do it fast), when you recive the gold from your miners (150) do an earth element quickly, after both finished their trainning, move them into the middle tower, after that they can happen 6 things:
Nothing: Enemy doesnt do anything, if this happen, check with your earth element what do he's doing.
Swordwrath: Enemy send a single swordwrath. If this happen try to kill him, if he move away check with your earth element what he's doing. If you kill him, do the same.
Swordwraths: enemy send 2 or more swordwraths. If this happen move away your earth element and attack them with your air element. If they move away go back to the middle tower, if they attack you use your air element, and when you see they are reaching in your side, garrison your miners. Try to buy more earth elements for this situation, and watch if he buy archidons.
Swordwrath and archidon: Enemy send a swordwrath and an archidon. If this happen attack the archidon with your air element, earth will attack swordwrath automatically. If the archidon move away follow him with your air element and try to kill him, if he garrison, then kill his miners with your air element. If both units move away follow them, always ensuring your air element go for the archidon, if they garrison, do the same as we told before.
Archidons: Enemy send 2 archidons. If this happen move your earth element a little foward of your air element, do this for archers aim at earth element, if he aim at your air element, move away your air element, and attack them with your earth element, if they still trying to kill your air element garrison him and attack them with your earth element, but if they go for your earth element attack them with your air element to. If they get away buy more air elements.
Spearton: Enemy send a spearton. If this happen, try to do more earth elements, and attack him with your 2 units, when you see he'll kill your earth element, move him away, and still doing earth elements. If he move away, follow him, once you get her side kill their miners, his economy its poor for that spearton, remember to make more earth elements to beat him early.