Um... what about those 2 seconds of lightspeed-lag? Double that if using RADAR to determine the enemy-ship's course and attitude.
Your scenario is flawed.
The only flaw in spinal-snapshots is that time devoted to lining-up a shot is time usually better spent trying not to get hit yourself.
-For that, I PESA my spinal energy-weapons.
I mean, shit, cyclotronsand particle-accelerators are round. Energy-flow can be bent.