Blacksad
Explorer
CRGreathouse said:
These are *your* assumptions, and are not really represented in the ELH rules - and only vaguely supported in the core rules. The biggest jump in power for a sorcerer is not level 1 to level 2 (as your statement would suggest), but 5th level to 6th. In fact, 17th to 18th is a larger power difference for sorcerers than 1st to 2nd!
One of the largest jumps, though, promises to be 20th to 21st, or perhaps 23rd to 24th.
That's why I said that the final judge for CR should be a challenging encounter for 4 PCs of that level, not other arbitrary stats.
not really his, but ours (i.e. I too, think that his system actually work).

To you the jump in power means higher level spell, doesn't it?
Now try a fight between a level 17 and a level 18 sorcerer, the number of hit point, increased saves, etc... prevent the combat from during only one round, but it doesn't require a lot of luck for having more damage done to the level 18, and the difference in hit point between the two caster isn't great, so the level 17 has some chances.
While between a level 1 and a level 2, if both throw a magic missile, the level 1 will always die first (unless he has taken the toughness feat, but I don't see many sorcerer doing this).
Also on the "big" jump at level 21, try to produce a meaningfull epic spell with a DC 80 (spellcraft 24 ranks +8 int +2 skill focus +30 item).
That was just looking at sorcerer, you can't honestly say that the difference between a level 1 and a level 2 fighter is less important than the difference between a level 17 and a level 18 fighter.