50' is too high for an A330, let alone an A320/321.
Start flare at 20' rad alt. Once flared, reduce thrust levers to idle. Look at the far end of the runway and adjust the pitch attitude so the aircraft is slowly sinking. You will grease it !
Damn, now I've given my secret to everyone!
I came from turbo props and STOL aircraft which had a thick wing and you could hold a level attitude and let them sink on as the lift decayed. This does not work with a thin wing - it will just run out of lift and dump the aircraft onto the tarmac heavily !
Good luck !
U