please, DO NOT include a voice over (of any kind!!) into the mix directly. we know of no one who likes that when listening to a promo set (pisses us off to no extent hearing it over and over) - so if you want to have a better chance of being hired based on your promo set - do not put the damn voice over. save that for the radio.
just to be clear, we’re talking about “dj [insert your dj name here] in the mix” or anything along those lines. what you should AND must do on your promo, and that (almost) nobody does, is to include your name and phone DIRECTLY AFTER THE SET - after the music ended.
assistants usually have trouble with hand writing, small fonts and trying to discern a phone number over the music - yes that IS true - some people give their phone number in the mix. would you believe it!?
your twitter account is fascinating for sure - but all we want is your phone number and a name, so if either is missing your twitter (or any other account) won’t help you much…
also, never send just ONE set as a promo. would you consider a designer after seeing his one design?