Port Mackerel is the best stage for Chargers! Rollers look like they do well. And they do. But let's get real... Unless they are close up, they can't hurt you. There are only 5 places they can come from, three of which a charger can lock down by capturing the center. The other two a charger can also guard by patrolling the center. In short, stick your head out and you are dead to a charger.