I'm hitting a brick wall on a key bit of sound design on a show I'm working on. It's set in a magical fantasy world and the moment I'm having trouble with is when a mind control spell is cast on one of the characters. The script calls for having both the voice of the magician and the characters audible. So I've already got two dialogue tracks - one of the character and one of the magician in sync, but the tricky part is combining those voices in a believable way where each voice is recognisable, but it's clear that the magician is exerting his will here. I'm having difficulty with both coming up with creative solutions that work and technically achieving this effect.
A few of my early brainstorms and tests included thinking along the lines of David Bowie's Space Oddity, where Bowie sings and octave higher and and double tracks and octave lower - so the result is this beautiful, eerie harmony. But with two voices that idea goes nowhere. Playing around with the usual EQs, reverbs, delays just muddies the clarity of the dialogue and it still sounds like two voices stacked on top of one another. A bit of reverse pre-delay is nice, but that's the only element I've liked so far.
I should also add that the magician ADR was recorded to exactly match the delivery of the possessed character. Perhaps this was a mistake and I should have tried to have gotten some variations, say having the magician whisper his lines, like he's whispering a suggestion in their ear...hmmmm. Some second opinions would be most excellent. Thanks in advance!