Originally Posted by ZOLANTON

Ok after trial and error, I managed to 3 medal the 3rd stage.

What I did was place a relatively weak team at 26k power at the top camp along with a very fast Helper at about 600 speed. That way my weak team would reach the boss and die there. The Helper Squad was fast enough to clear the remaining two enemies at the top route.

At the bottom node I put a little slow squad at 484 speed to quickly go through the hurricanes. The other two squads (at about 540 speed both) went in the middle camp.

I went with this strategy, got 3 medals on my first try. Thanks for sharing!

Setup:
Top: Helper: Power (whatever), Speed (~600) + Squad 1: Power (26k), Speed (whatever)
Mid: Squad 2: Power (whatever), Speed (~540) + Squad 3: Power (whatever), Speed (~540)
Bot: Squad 4: Power (whatever), Speed (~480)

Basically, you need a squad at 26k (no more) up top and then you won't need to worry about power as long as your other squads can beat their pests. What you really have to adjust is the speed of each squad (except for the top squad with 26k, it doesn't matter if it's got 300 speed or 1000 speed, it'll always die at the boss).