I think buffing the fire rate is the wrong way to buff H-3. Its fire rate isn't all that bad if you get the timing right (it's significantly faster than it is when you just spam ZR). I think what really hurts this weapon is the endlag. It takes forever to get back into your ink after a burst, leaving you very vulnerable. Reducing this lag slightly would give it more options during fights and make the weapon be punished less for missing, without changing its paint output or dps. Its paint is actually pretty good, being not a whole lot worse than shot (again, if you time your shots right) and you already buffed it, so it doesn't need another increase.