Really sir? i mean look where your luck ahs led you in the first 7 rounds... 
Luck is not an excuse for out success. You are ignoring multiple components:
- A great starting strategy
- Great management in each round. We lose almost no time deciding whether a set of decks is legal or not, and we have a good view on all possible deck-building options and salvage.
- Despite point 2, we finish deck-building 10 minutes before the deadline. We use all the given time to find the optimal solution for each round.
- Even when we find it, we test our decks for hours.
- Thanks to our many wins, we could salvage ~40 cards each round, that gave us huge adaptation ability.
- Most of our loses come from bad luck (of course not all).
- Most of our wins come from good strategy (of course not all again).
- We have very skilled players.
- If someone does not feel skilled enough, but the strategy forces him to play it, we train the player as long as necessary and draw conclusions.
- We were successfully hiding useful cards in our vault for a long time. That allowed to surprise our opponents.
- Other teams revealed almost everything about their vault.
- We don't whine, when we are at disadvantage but we find solutions to our problems (believe it or not, fighting multiple Generals in a round is problematic)
- If a solution does not exist.. only then we resort to luck.
