If that's the plan then don't set yourself up for a broken heart when you discover all that filled brood comb hanging off the bottoms of your DEEP frames. What will you do then? You'll need to carefully cut it off and wire it into another frame. Sounds like fun, NOT
Why would you want to bother with that?
Just build "dummy" boxes placed below the DEEPS to fill the empty space. Its easier than letting them build comb and 'fill it w/ brood' that will be a pain to deal with later, for you and your bees.
A DEEP frame with bees is enough to handle. Why add another 6" of comb to it by leaving a void for your bees to fill? BEES HATE VOIDS