Upper_Krust said:
Of course the key to my system is the CR-EL relationship, not the CR factors.
I couldn't agree more! (It's especially spiffy with individual XP awards.

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Recently, EN-user pogre was asking me to help him design some encounters for a weekend adventure. Once I got my own brain wrapped around the system, it was amazing how quickly balanced encounters came together.
Determine the Party's EL
1) Add all of the party's character levels together.
1a) If, like me, you're using the CR factors to allow players to tweak race abilities, for example, add in those bonus CR as well. (Adding CR is sort of like adding ECL, but much simpler with UK's system!)
2) Take this total CR, find the EL on Table 2-1.
3) Take this EL to table 2-3 and adjust for the number of characters in the party. You now have the party EL.
For example, let's say you have four 6th level characters.
CR6 + CR6 + CR6 + CR6 = CR24
CR24 = EL 19; EL 19 with 4 combatants = EL 15.
Determine the Desired Encounter Difficulty
1) Use Table 2-4 (or 2-5) to determine the desired difficulty.
For example, if I want a short, easy encounter to sap about 12.5% of the party's resources (with a 93% success rate) I want an encounter that is "EL-6."
Thus, if my party is EL15, a short easy encounter would be EL 9.
Determine the Size of the Enemy Force
Because the number of combatants affects EL (Table 2-3 again) I next go to the "scale" of the enemy force. Do I want a single difficult opponent, a small group of 4-5, or a war party of 12-15?
1) Let's go with the war party. 12-15 opponents is EL -7.
2) The target EL is 9 (easy), so the adjusted EL for 12-15 opponents bumps back to 16 (EL 9 + EL 7 = EL 16).
Determine the Specifics of the Enemy
1) Start with the adjusted EL16.
2) Convert this back to CR. EL 16 = CR 14-15.
3) Now "purchase" the enemy out of this CR total. For example:
Orc War Chief (with Bbn levels) (CR 4, CR 11 remaining)
Orc Shaman (with cleric levels) (CR3, CR 8 remaining)
Orc Warriors (CR 2/3 each, x12 = CR 8, 0 remaining)
14 Total Combatants, Total CR15, EL 9.
An easy encounter for four 6th level PCs.
Just one of the many uses for UK's system that will be seeing print in GRIM TALES. (So, uhh, please correct me if I did it wrong!

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Wulf