I was thinking about variations on the Jonus Brothers list that will be possible when the new cannons from Wave 6 drop. I haven't come up with anything that I think would be great against the current popular builds but I did come up with one that looks like it might be fun. It trades a little bit of damage from the original list for increased control.
Jonus w/Squad Leader
2 x Delta w/Mangler Cannon + Ion Pulse Missiles
This leaves 2 points. That gets either a Seismic Charge or Flechette Torpedo on Jonus or lets you put Munitions Failsafe on both of the Deltas.
I really enjoy the Jonus Brothers list and wish I could find a more competitive version. I think this list might be a step in the right direction but I don't think it quite gets there.