What's the song playing when the group is discussing what to do while Bisky throws the dodgeball in episode 70?
The scene you're talking about starts at 20:13

That song is one of my favorites, its name is : Reason ~ Instrumental

(Yeah it is the instrumental version of the ending 3)

Here is a link : https://www.youtube.com/watch?v=I7uXsgsZlps

(The part you're looking for starts at 1:05)

It is also played when Kirua fights Rammot