Shiinari

Well, I'm going to be captain of my rocket team next year. I'm a freshman, and I kinda got this job by default. I know all the rocket basics (equations, calculus, drag, pressure, force, etc), but i want to know what type of rocket fin will enable my rocket to go fast at a vertical line. I am using a launch lug attached to a launching rod, and can use A and B engines (as many as i want). I know not to use inverted or canted fins because this decreases velocity, so what type of fins are best for shooting fast and far in a perfectly vertical direction?