Wait, Cyclops doesn't just open his eyes to fire his blasts, his hand has to open the visor etc, right? Or at least, he still has to control them somehow.
So this comparison is moot, as they are starting on a level playing field. Cyclops isn't standing there, hand on visor, ready to GOML as soon as the bell goes, and Deathstroke isn't standing there with his finger on the trigger.
Not to mention, Cyclops might not even hit DS.