The art of circle strafing is not to move in a perfect circle around an opponent. Simple reason for this is because not all opponents move the same way.
Learn to use mouse-look and strafe keys, it's much better.
The whole point of circle strafing is to keep out of your opponent's field of view whilst still keeping your crosshair trained on then.
Moving in a perfect circle would just end up getting you confused yourself.
Oh, and it should be possible using Aliases. Good luck winning with it though.
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