X-Wind Technique
using lateral sidestick inputs during a x-wind t/o is not a great idea. My company sticks with the Airbus FCOM and teaches against using it during rotation. Once you reach round about 1/3-1/2 side stick the spoilers will start to crack open which in turn creates an additional pitch up moment on rotation - increasing the risk of a tailstrike. The other important issue is that you are demanding a roll rate from the aircraft, not just a certain amount of aileron/spoiler deflection so the aircraft will keep rolling on rotation unless a correction is made.
{Edited for Spellin}