hm okay, so actually whether you're on task or not can matter too, under certain conditions. Once you reach 50% accuracy on the target, gains in accuracy result in diminished returns. So with the rapier vs sarasword if it turned out with your particular set-up rapier resulted in 40% accuracy and ss in 50%, the slayer helm would increase the dps of the rapier by a higher percentage than it would the dps of the ss. A heuristic argument for why rapier could very well be better than the maul, is that the maul becomes "too accurate" (i.e > 50%) with the optimal gear, so accuracy becomes less important, allowing the chaotic rapier's higher dps to win out. The question is if it get's to this point or not.