Played mixed yesterday against a 4.0 guy. I could tell in warm-up I was going to be in hot water the entire match. He calmly hit the corners on his serve, and I couldn't read it at all.
After a few attempts at a normal return, getting none in play, I switched to the slice return. It was better, but they kept floating long.
I adjusted my grip from Conti to Eastern, and I got just enough of them in play for us to break him once. Then he started body serving me, and I started missing again.
Gotta keep working on it. I think this return will be essential in mixed. Even a crappy, floating slice return that goes in and is deep is better than slapping the ball into the net.
-- Random Error Generator, Version 4.0
-- Master Moonballer