I reccomend at least 50CC30 fuΔΊl team to clear the desert maps..though with a 50cc30 team you wont be able to beat base scramble 1 (unless the team is a full black one with broken units like Nanaly and Sue) but you can clear Fiery Oasis.(30 stamina map)..should be a good place to lv up your team by grinding that map.