Okay, if he really want to only use those ship with the cards they come with, there is pretty much only one way and that is:
Horton Salm+R2 unit+Proton Torpedoes+Proton Torpedoes+Ion Cannon
Tycho Celchu+Push the Limit+Homing Missile
Green Pilot+Push the Limit+Homing Missile
It is not an optimal build, but 3 ship only is not optimal anyway. The problem is that he picked both ship with only 2 attack dice.
If you don't mind lending him a X-Wing and him using cards he might not have, here is a Squad I used a couple time and had success with it:
Dutch Vander+Ion Turret
Alternatively, he could give one A-Wing Push the Limit and a R2 unit to Dutch.