1.4 Swim Speed Up: Helps with re-positioning and escaping tight situations
0.5 Ink Saver Main: Gives you 3 extra slots from a full tanks. Also gives you 2 extra shots from a splash wall from full.
Object shredder: Very good for the weapon as it can destroy opposing splash walls easily and pop rainmaker shield quickly
Thermal: is very good for the weapon due to the projectile shots from the weapon