I just want to get better about using my sub and special weapons, given that they're maybe 2/5 of a weapon's makeup. I generally don't use subs to the chance of running out of ink in the middle of a firefight. The exception is Suction Bombs, which I spam the tower with in its respective game mode. Or used to, seeing as I recently hit B ranks and I assume that it becomes a lot less effective the higher you go.
As for specials, I use them, but inconsistently. I try to land Tenta Missiles from across the map (it makes it easier to hit multiple targets and is safer) in situations where the enemy is grouped together, but I'm no good with the others.
So yeah, I'm looking for tips regarding how to get better about using the secondary features of the weapons. Weapon-specific, map-specific, and mode-specific advice is welcome, as long as it pertains to subs and/or specials.