I think I get what you're trying to do.... How 'bout this....
To make a perfectly circular path, draw a mask on a layer, select the mask path, Cmd-C and then select a position property and Cmd-V.
To then orientate the layers along the path, use...
Layer -> transform -> Auto Orient.
Orient along path and the layer sits perpendicular to the path. You can offset this with the standard rotation controls. Or orient towards camera.... does what it says on the tin.
If you want to be smart, make a null object, call it target and then paste this into the orientation property of your layers.
L = thisComp.layer("target");
Now they will look at the target. You can use the rotation properties to rotate the layers relative to this. 180 in the X rotation will make the layer look away from the target etc.