Not sure what you're asking. All of Canon's AF points are sensitive at f/5.6. Some have additional accuracy with faster lenses (f/2.8, usually the center point), some are single lines and some are crosses.
AF is always done with the lens wide open, regardless of your selected aperture - the lens stops down just as you take the picture. All Canon lenses are f/5.6 or faster when wide open, and 3rd party lenses that are f/6.3 at the long end spoof the camera into thinking they're f/5.6, so AF works. The only way to get a 'lens' slower than f/5.6 is to add a teleconverter, which costs 1 stop for 1.4x, 2 stops for 2x.
What distinguishes 'pro' (1-series) AF is more points, more cross-type points, more higher-accuracy points (f/2.8 or f/4), better tracking algorithms, greater sensitivity (better in low light), and more customizability.
There's a write-up on Canon AF here
, with lots more details.