3 starred ?-8 on my first try with Miu's helper squad
I started off with this setup:
Top left tent: 2 squads - Helper squad(~70k) + a weaker squad (~40k)
Bottom left tent: 2 squads - Main squad (~70k) + a weak squad (~24k)
Top right tent(beside the flag): 1 squad - ~50k power
No squads for the other 2 tents.