The Sigil
Mr. 3000 (Words per post)
WRT to the "quadratic scaling" - some of the abilities scale linearly, some scale quadratically. In general, abilities that simply "increment" - increasing BAB or Caster Level, for instance, scale linearly, because there's generally not a lot of synergy. In general, abilities like this cost Y times the new bonus where Y is some constant. Just like the fighter needs 1000 XP to get to 2nd level (and get a +2 BAB) then another 2000 XP to get to 3rd level (to increment his BAB to +3) and so on, these abilities scale in cost linearly.Conaill said:Let me dig up my question to Sigil from page 2 again... guess it got lost in all the OGL hubbub:
Abilities that are "choices" - mostly Feats, but also (to a lesser degree) saving throws and access to spells - tend to scale quadratically, because there's a lot more synergy that is involved because you're not picking a specific ability - you're picking "one choice from a huge menu that may or may not have good synergy from other stuff." ("Why Saving Throws?" You ask? Because Saving Throws tend to be applicable to a whole lot of situations, such as avoiding traps, resisting monster abilities, throwing of spell effects, and so on - contrast with BAB which just affects swing-and-hit or swing-and-miss in combat).
While the "synergy" argument is a convenient one, I guess, the real answer is that the quadratic scaling in these cases yielded the set of equations that offered a "best fit" line between re-building the 11 Core Classes and the "Core" XP chart.

--The Sigil
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