I will just answer a few things, since I believe my opinion is not needed on many subjects talked about here...
Upper_Krust said:
A 2nd-level character is twice as powerful as a 1st-level character..
Not true according to WotC, since they say a 1st-level character is CR 1 and a 2nd-level character is CR 2. According to them, an encounter against a 1st-level character would be EL 1 and an encounter against a 2nd-level character would be EL 2. WotC thus do not consider a 2nd-level character to be twice as powerful as a 1st-level character, because if it was so, an encounter against a 2nd-level character would need to have an EL equal to an encounter against a 1st-level character +2, which it does not.
UK, you said the following :
Upper_Krust said:
This would seem to take care of the problem, since an encounter against a CR 2 would be equal to an encounter against an CR 1 + 2. What I wonder is why a CR 1 is not EL 1.
Upper_Krust said:
A 5th-level character is vastly more powerful than four 1st-level characters.
Here's the one where the true problem lies IMHO. Any one of these two encounters would have an EL 5 according to WotC.
If you take a party of 4 1st-level characters, they'll have approximately 50% chances of survival against 4 1st-level characters. 50% chances of survival means that the EL should be (avg. party level + 4). The CR 5 is thus justified if this encounter is for a party of 4 1st-level characters.
If you take a party of 4 5th-level characters, they'll use less than 20-25% of their resources to win the fight. An encounter for which a party uses 20-25% of its resources should have an EL equal to the avg. party level. Since the 5th-level party uses less than 20-25% of its resources, the EL of the encounter should be less than 5, which it isn't, at least according to WotC.
If you take a party of 4 5th-level characters, they'll probably use 20-25% of their resources to win the fight. Which means this encounter should have an EL equal to the avg. party level, which it has. OK so far.
If you take a party of 4 1st-level, they have less than 50% chances of survival against one 5th-level character. The EL should thus be higher than avg. party level + 4, which isn't the case.
Upper_Krust said:
A 20th-level character is not equal to four 16th-level characters.
This one is nearly the same as the one before, except it's the other way around. These two encounters would have an EL 20 according to WotC.
A party of 4 16th-level characters would have more than 50% chances of survival against one 20th-level character. So the EL should be less than avg. party level + 4.
A party of 4 20th-level characters would use 20-25% of their resources against a 20th-level character (that's more or less always the case when a party of a given level fights one character of the same level). This would mean that the encounter should be EL 20.
A party of 4 16th-level character would have 50% chances of survival against 4 16th-level characters. Which means the EL for this encounter should be avg. party level + 4, which is the case.
A party of 4 20th-level characters would certainly have to use more than 20-25% of their resources in an encounter against 4 16th-level characters, which means that the EL should be higher than avg. party level.
My conclusions :
1. Better for UK than for me to create a CR system that works. But I'll probably use his system if it ends up to be better than the one by WotC.
2. The system is clearly broken, even though I was happy to use it as is, making calls myself when I had to plan an encounter or give XP after it.
PS : Bear with me if there are any grammatical errors in what I wrote, but it's 6 am here and I still haven't slept...
