FormerlyHemlock
Hero
I think it was noticed in Gobelure's thread that his system seems to indicate that encounters are a bit easier than the official encounter guidelines. And certainly it's possible that the numbers need some tweaking. Since the definition of an Easy encounter isn't constant across levels in the official system, and there is rounding involved, it's won't mimic the official system precisely. But there's no reason in principle why system like Gobelure's, but with tweaked numbers, couldn't deliver results that are comparable to the official system for even-PL groups.
You can't just tweak the constants in the equation--you have to change the form of the equation. A linear equation like Gobelure's can never deliver correct results over a wide range of values when the underlying system is quadratic. All you can do is linearize it over a tight range.
Note to self: write up a quick web app for estimating the damage a party will take from a given bunch of monsters. The web app will not have the form of a linear equation.