If you are looking for easy manual Shock team
Minazuki, Shinobi Spy - Magus
Storm Eddie
Magus/Gunner Child of the Damned or any ally that can give extra Power
Farmed Powerslave. Each stage you have 6 power to use Minazuki Two Heaven Strike which drops up to 3 Shock on all enemies. On the boss round use Storm Eddie Bolt basic attack after Minazuki - Can average around 40 shock per clear.
Lower Power team is similar setup
Speed of Light Eddie
Magus/Gunner Child of the Damned or any ally that give extra power.
Random ally or none.