Also, may add some stereo dimension when taking panning into account. What do you say?
as octaves go up and down, you need different amounts of notes to re enforce the same exact sound you had. using the same exact 'notes' in different octaves will make the sound different, in fact dare i say will weaken it and add an 'ick' factor. if you tell me any notes and exactly what octave they are in, i will give you my best suggestion(s) of how to re enforce it while keeping the exact same flavor. you can even tell me how much distortion you happen to have on it. i promise you the answer will never be the exact same notes in a different octave..... that's just not what's gonna re enforce the original sound.  the exception to this is if you started with only 1 note