So you are saying the magnitude has to be 1.0 or higher in order for them to actually be pushed away? I will have to pay attention again because I'm pretty sure at level 6 the bots are knocking back the mobs, not knocking them down and that is a 0.5 magnitude. They might not be knocked back as far as the swarm missiles do but I'm pretty sure they are still being knocked back.
Edit: Ok, I was totally wrong in what I thought I had remembered seeing. I never knew that under 1.0 magnitude was actually a knockdown and didn't push them anywhere. Thank you for the clarification on that. 🙂
Edit2: I'm stupid and should have just looked at the Wiki. It clearly states on the knockback page that in order to be knocked back the magnitude has to be above 0.75. So you were essentially right with saying 1.0. Again, thanks for pointing out that they actually do knockdown due to the magnitude.