probably also depends what bike you're riding. e.g. "long and draggy" might be easier on a fixed whereas short and sharp might be easier on a geared, also climbs near the start are harder. Distance climbed in one continuous climb x minimum gradient (of that continuous climb) squared x distance from the start would be an interesting calculation.
e.g. a real steep bastard of a hill right near the end would get lots of points because the gradient is squared but also it's right near the end so you've got all the other miles in your legs already.
