What strategy could the Confederates have used which would have won them the war?

Going on the offensive instead of defending during the first half of the war. Had they actually attacked Washington D.C. they might have actually won and negotiated some kind of treaty to end it. Other than that had they tried more diplomacy matched with a show of arms after some major victory, maybe they could have compromised, instead of being totally separate they would still have tight ties of friendship with the north, but remained separate in terms of politics and laws. However i would have put money on them winning had they gone on the offensive, they had a better army during the first half of the war, however they had limited supplies, and soldiers, thus even a victory against the north still cost them. In short had they used the idea of blitzkrieg to overwhelm and get to their goals short, fast, and furious they probably would've won