I don't quite get your question as I've never seen the term 'angle of attack' used for rotor terminology (not that I can remember anyhow). Why would the AoA have to increase when you move the cyclic? You only move the rotor disc tilt direction with cyclic
I think you may not understand how the rotor tilts. It's not, as one may easily assume, because the entire rotor hub tilts. The tilting is a just a by-effect of the blades being hinged, and them producing differing amounts of lift. So when the rear blade is producing more lift than the front blade, it will move more up than the front blade, and the rotor disk will appear to tilt forward. But it's just aerodynamics causing this, not something which actually tilts the rotor hub. And hence, the rotor will not tilt if it's not spinning. If the rotor is not spinning, the only effect of moving the cyclic is that you can see the blades change pitch angle (though this may not be correctly modelled in every sim).
If you are at maximum collective ( all blades at max angle of attack ) and you move the cyclic, how can the angle of attack on the blades as they come round increase if they're already at maximum
You seem to assume that max collective will produce an angle which is the abolute maximum the blades can have (before stalling I assume?). But having max collective right on the edge of stalling would be quite dangerous, since it then wouldn't take much to put them over the edge (like a little gust of wind from the wrong direction, or some turbulence), something you don't want to be happening all the time. So max collective will produce something which is well below the stalling angle for the blades, and even full cyclic adding some more pitch on the blades shouldn't but them above the stalling angle during normal conditions.
Also note that the amount of pitch the cyclig needs to make to the pitch is quite small compared to the collective. It takes a lot of force to carry the weight of the entire helicopter (what the collective controls), but in comparison it doesn't take much force to make the helicopter roll, just a small difference in lift from side to side or front to back is enough.