>>23361575This.
I run Draining Kiss on my Calm Mind M-Audino, and it becomes a scary move after a few CMs. The damage is less of your opponents worry, it's the massive 75% recovery. And Gardevoir has a much smaller HP stat than Audino, meaning it'll be recovering a lot of health.
Of course, it's far weaker than Hyper Voice and Moonblast, but if you don't have access to the move tutor moves for one reason or another, Draining Kiss shouldn't simply be overlooked because of it's base power.
Imagine if Giga Drain was overlooked because Energy Ball did more damage?