Launch as you said is key. My car launched best for me on stock rubber by reving the car to about 2500 and riding the clutch out nearly all the way through first gear before grabbing 2nd. Shift at about 6000rpm as well. I was only about to run about a 13.8 with a tune and shifter, but I'm not the best driver in the world either. Eventually with bolt on's I was able to run a 12.85 on drag radials.
Hope this helps.
--John
Still Stangless
2013 Ford F150 FX4 Ecoboost
2013 Honda Odyssey (wifey's whip)