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Message: <blockquote data-quote="Cheiromancer" data-source="post: 1508650" data-attributes="member: 141">Thanee,The CR is from UK's revision.  A close approximation is to multiply core rules CRs by 1.5, or x2 for dragons.No, you use a CR 10 critter to challenge a 10th level party.  CR 10 turns out to be EL 14 (as given by the chart).  A CR 11 is also EL 14, so you might want to give the party a mixture of CR 10 and CR 11 encounters.  That's the easy way of looking at it.A harder way of looking at it is to take a party of four 10th level PCs. According the revised Level/XP chart (second chart in the second post), a 10th level character has 92,000 xp, and needs 120,000 xp to get to 11th level.  That's 28,000 xp per person, or 112,000 xp per group.  Divided by 13.33 you get 8,400 xp per encounter.  That's between an EL 14 encounter (which yields 7,200 xp) and an EL 15 encounter (which yields 9,600 xp).  So the average encounter has to be a bit higher than CR 10.  You need 15.56 EL 14 encounters for them to go up.A slight wrinkle in the system is that the standard array gives a +1 CR to player characters.  So a 10th level party really needs a CR 11 challenge.  But CR = party level is close enough.  A hard way of calculating the encounter appropriate to a 10th level party is as follows: calculate the party's EL as if they were monsters.  The total of their CR is 44 (they are each CR 11, remember).  That's between 40 and 48, so they are EL 22  (and halfway to 23, so you might say 22.5).  Subtract 4 for being a 4 member group (2nd chart of the first post) and you get EL 18.  An EL 18 encounter should use up all the party's resources, and kill them half the time.  To get a 50% encounter, subtract 2 from the EL.  To get a 25% encounter subtract 4 total.  EL 18-4 is EL 14, which is an average encounter for a 10th level party.We dropped a decimal when calculating their EL; the party's EL is probably closer to 18.5, and so a 25% encounter would be EL 14.5; a little more than EL 14.  Which agrees with the first two methods.The great thing about UK's system is you can calculate when an encounter is too hard for a party.Say you take the approximation that a CR 10 or CR 11 encounter is appropriate for a 10th level party.  That's EL 14, which should use up 25% of their resources.  Adding +2 to the EL should be an encounter which uses up 50% of their resources; that's EL 16, whcih corresponds to CR 14 or CR 15.  A really tough encounter, one that uses up 100% of their resources, would be EL 18; a CR 20 encounter.Again, you want to use Upper Krust's CR calculations in your formulas.  Core rules works well when the CR is very close to the party's level, as in the case for 25% encounters for mid level groups, but doesn't work as well when you are looking at 50% or 100% challenges, or when dealing with high level groups.</blockquote>

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