What type of fairing is most efficient?
Should the top of my fairing be a pointy dart, or a round nub?
I always used to do the former, but when I read this Kerbin ascent guide which suggested to make the fairing a rounded nub, I got confused.
I thought that the first shape would minimize my drag by cutting through the air by being pointy (I wouldn't dare assume that works IRL, but, AFAIK, KSP has a simplified aerodynamics model, right?). I understand, though, that the first design has more fairing, so, not only does it cost more, but it weighs more (my rocket increases from 98.1t weight to 98.3t weight), which, while bad for TWR and deltaV, might actually help just the tiniest bit to keep the rocket more stable on ascent and less prone to flipping, if I understand it correctly.
So, which is more important? Minimizing drag, or minimizing weight?
Or, if I'm asking the wrong question, then, at least - which is better? The first fairing, or the second?