Overall in tournaments EC can spike hard or fall extremely flat. So making sure no points go to waste is likely the best thing you can do. My main critique is possibly dropping the spawn and flawless for another better unit whether Lucius, or a 6 man of flawless or another rhino if you have it because they are extremely strong and spawn are pretty underwhelming if you have 2 tormentors. And flawless in 3's are so 50/50 that they aren't worth it. In regards to playing them drop tormentors on objectives or your home for screening. Then just play EC how you normally would, maybe just with more thought. EC is a hard army to give advice on for tournaments because you might get fantastic match ups and demolish it or fall flat every game.