spread macros are really just some fancy wow key bindings.

for a 2 instance spread macro, there isn't much to do besides put them next to each other in a line.

for this example, use F11 to spread out and F12 to come back together.

in wow1 key bindings:
--
find strafe left. bind to F11.
find strafe right. bind to F12.

in wow2 key bindings:
--
find strafe left. bind to F12.
find strafe right. bind to F11.

you may also want to have a key to make your main back up a few steps without having your clone move. bind appropriately.

as for LOS and follow issues, i don't know how you'd do it in AHK, but in keyclone you would allow the rotate keys to pass to the clones and just don't use those while driving. that way, once in a fight, you can still spin to face the targets

hope that helps