Hi! my name is Sam, nice to meet you! even though i'm new on freelancer, i'm an experienced audio engineer, besides working in studios, Im a singer and I make my own medley (instrumental version) for live performances, by the way working with normal songs is no problem.
Most of my work is exactly what you described, I edit, cut, rearrange or shorten the songs, eliminating parts and going straight to a chorus or to an specific part of the song and then i look for the smoothest way to go from one song to the next.
If needed i can overlay any sound or Fx's you want.
This kind of work is usually fast but some songs are tricky, but i believe i can deliver the mix earlier than i selected in the bid.
Looking forward to working with you!