The 2 mains of MPU allow me to get 99.9 damage with 3 shots. So if the enemy is in the slightest of ink, getting those 3 shots are guaranteed a kill. 2 subs of IRU is good to have so I can get my ink back after shooting a lot. The 2 subs of ISS are good for splash wall usage and I can fire more shots before going back into my ink. 2 subs of QSJ is self explanatory. You can do an alternative set replacing the sub of SCU with special saver. SJ is self explanatory and the 3 subs of SSU helps with good mobility.