{Divine Deflection}, damage dealt to me is enough to beat me despite the X I prevent, to which I deal directly to my opponent...who wins?
The card is cast and resolves putting a condition in play. (The card goes to the graveyard and play continues)
The damage is then calculated, at this time X is prevented and redirected and allocate accordingly.
All damage resolves simultaneously. If there was enough to kill both people, it's a draw.
RESOLVED