I've tried all of the following, with varying results.
Tuner -> Dist -> Chorus -> Delay
Tuner -> Dist -> Delay -> Chorus
Tuner -> Chorus -> Dist -> Delay (personal taste this one, kinda fun with a deep and medium speed chorus)
Tuner -> Delay -> Dist -> Chorus (this one is cool if you have a longish delay set with short repeats, so the notes kinda trip over each other, think Sigur Ros but not quite)
If I didn't have a mute at the end of my chain then I would use a Tuner at the end for muting.
HTH