Co-witness preference

[Alchase]

Those of you who co-witness their AR sights with their optics, which is your preference?
 I like mine "on the front post" but would like to hear others opinion.

[fishngamereaper]

Mostly on with a slight cut into.  Sometimes hard to tell depending on size of dot. Eotech I'll do on top , aimpoint I can walk into the front post slightly.

[Alchase]

I was on a diffrent sight the other day, a few were co-witnissing at 1/3 height. I did not catch the explanation or advantage though.

[Special T]

If you have a scope I like the 45deg iron sights. 2c