I find it strange that so many people in this thread had difficulty. I thought it was fairly easy and the tutorial was better than most.
Once you can dual wield, give Zephyr two machineguns, Vashyron a handgun, and Leanne a grenade case.
Trust me on this one, when in doubt...use grenades. Grenades are EXTREMELY useful because they break the battle system. (You're supposed to 'prep' damage with machineguns, then do 'real' damage with handguns, but grenades just do massive damage, break most armor very easily, and stun enemies. Even most bosses. Actually, they make most boss fights really sad. Excluding the 1v1 boss fight that Zephyr has to do. GOD THAT FIGHT WAS HARD AS BALLS unless you went in with a machinegun and grenade case.)
Once you can dual wield, give Zephyr two machineguns, Vashyron a handgun, and Leanne a grenade case.
Trust me on this one, when in doubt...use grenades. Grenades are EXTREMELY useful because they break the battle system. (You're supposed to 'prep' damage with machineguns, then do 'real' damage with handguns, but grenades just do massive damage, break most armor very easily, and stun enemies. Even most bosses. Actually, they make most boss fights really sad. Excluding the 1v1 boss fight that Zephyr has to do. GOD THAT FIGHT WAS HARD AS BALLS unless you went in with a machinegun and grenade case.)