It’s not just a simple circle shoot, it’s strafe right and circle shoot. The predator’s melee attacks line up with the predator’s camera, which is over the right shoulder, if as FT you want to dodge the predator attacks, circling to the right will bring you out of the cone of attack faster. If you circle shoot while strafing left, you will let the pred land more melee than necessary.
The predator cone of attack for melees coming from where the predator’s camera view is, over the right shoulder, is also why you want to aim at the shoulder of the weapon arm if you are FT parrying the pred with your knife. This is especially the case with the alpha sickle, as it is a harder weapon to parry so you need to give yourself a better shot to make sure the Predator cries whenever they try to engage in melee

