Ok so I went through the Renegade with 4 friends just now.
I was Alani.
I had 6 of 25 “Lifeguards” done going into mission.
We all must have lined up and let me do Riptide on us all at least 25-30 times.
I made sure to move into the stream every time.
But then, come end of Renegade, I was only at 7 of 25!
What?!?
The only thing I could think of was because my party generally had full health when I did it maybe it didn’t count them as being “affected” by the Riptide?
Needless to say, I’m quite annoyed with Battleborn right now!
Oh, and @GUNZERKUS thanks for the help!