Have you tried the new digital mode FT8? It is truly incredible what signals can be decoded and not heard or even seen on the waterfall! Well if you are like me, you kind of like have a conversation with your QSO you might try OLIVIA mode. It also uses low power and I have decoded signals with it that I could not hear and barely see on the waterfall. Sure OLIVIA is slower and if you are looking for speed then FT8 is your ticket!
Watch this review of OLIVIA from Ham Radio Concepts, then watch his follow up video next talking about CONTESTIA mode!! Great alternatives for low power digital QSO's!