This loadout is a basic set for the Custom Hydra (can be used for vanilla Hydra too).
16 AP Main Power Up: Makes minimal damage dealt >16.
6 AP Quick Super Jump: Self-explanatory.
19 AP Run Speed Up: Self-explanatory.
10 AP Ink Resistance Up: Eases Hydra's mobility on enemy ink and survives 99.9 hits more easily.
3 AP Swim Speed Up: Increases the swimming speed significantly because it is a heavy weapon.
3 AP Bomb Defense DX: Resists Tenta Missiles and Inkjet more easily.