arm lock helps, enjoy 40 pinpoint damage, use the rockets early cause there isn't much armor in that arm. after you've fired your rockets, you can loose your whole right side and still retain all your weaponry, so torso twist aggressively after each shot. a variation of the B33f's deadside misery. alternatively
Rather than the rocket launcher, maybe some reaching energy weapons would be an interesting addition? Rocket Launchers don't benefit from the sole reason to equip a missile weapon: 15% cooldown reduction.
Or you could easily swap an SNPPC for an HPPC, increasing burst by 5 (downside being the misaligned cooldowns)