Expanded ECL rules! (Version 4)
I've finally finished! After taking what UK had along with his article in Asgard 6 and combining it with a few ideas of my own, I think I have what could be the cloest thing to a perfect system that we're gonna get.
REVISED ECL/CR RULES V.4
Determining ECL:
CLASS ECL MODIFIERS
+1 ECL per Class Level*
+1/2 ECL per Integrated Class Levels**
*Commoners receive +1 ECL/2 Levels. All other NPC classes receive +3 ECL/4 Levels.
**Integrated Class Levels are when a creature has, for instance, the spellcasting abilities of a Level 20 Wizard or a Level 20 Cleric, such as a Titan. (A Titan would receive +10 ECL for 20 Integrated Class Levels.)
DIVINE ECL MODIFIERS
+10 ECL for Divine Rank 0
+20 ECL for Divine Rank 1
+4 ECL per Divine Rank over Divine Rank 1
HIT DICE ECL MODIFIERS
+3 ECL/4 Hit Dice (75%) for Dragons and Outsiders
+1 ECL/2 Hit Dice (50%) for Magical Beasts, Monstrous Humanoids, Shapechangers
+1 ECL/3 Hit Dice (33%) for Aberrations, Elementals, Fey, Giant, Humanoids, Undead (except for Skeletons and Zombies)
+1 ECL/4 Hit Dice (25%) for Animals, Beasts, Constructs, Oozes, Plants, Undead (Skeletons and Zombies), Vermin
+1 ECL per +1 CR increase of a Template
ABILITY SCORE MODIFIERS
+1/-1 ECL per +10/-10 total modifier to Strength, Dexterity, and Constitution and +20/-20 total modifier to Intelligence, Wisdom, and Charisma, minimum +1/-1 per grouping (i.e. an athach has Str 27, Dex 12, Con 21, Int 7, Wis 12, Cha 6, which constitutes Str +16, Dex +2, and Con +10 for a +28 total for +2 ECL, Int -4, Wis +2, and Cha -4 for a -6 total for -1 ECL, giving the Athach ECL +1 total for ability scores modifiers)
SPECIFIC SPECIAL ABILITIY MODIFIERS
+1/2 ECL per 5/+1 Damage Reduction
+1/2 ECL per 5 points of Spell Resistance over 10
+1/2 ECL per Energy Resistance
+1 ECL per Energy Immunity
+1/2 ECL per 5 Fast Healing or Regeneration
+1 ECL if creature has Spell-Like Abilities that duplicate 1st-3rd level spells that are usable at will (half that if usable a certain number of times per day, quarter that if usable once per day or less)
+2 ECL if creature has Spell-Like Abilities that duplicate 4th-6th level spells that are usable at will (half that if usable a certain number of times per day, quarter that if usable once per day or less)
+3 ECL if creature has Spell-Like Abilities that duplicate 7th-9th level spells that are usable at will (half that if usable a certain number of times per day, quarter that if usable once per day or less)
+4 ECL if creature has Spell-Like Abilities that duplicate spells of 10th level and above that are usable at will (half that if usable a certain number of times per day, quarter that if usable once per day or less)
+2 ECL per 100 Spellcraft DC of Spell-Like Abilities that duplicate Epic Spells that are usable at will (half that if usable a certain number of times per day, quarter that if usable once per day or less)
+2 ECL for Blindsight
+1 ECL per appendage over two
+1 ECL per 100% increase in movement over standard movement based on size
+(Creature's Hit Dice ECL Modifier) if the creature can summon more of its own kind, multipled by the number of times per day it may summon (i.e. a Hecatoncheires can summon another of its kind once per day, so it receives +41 ECL because it is intially ECL +41 for being an Outsider)
OTHER ABILITIES
All other Special Abilities are subject to the DM's discretion based on relative power.
For the purposes of this system, ECL equals CR in all cases. For CRs over 20, use the following table, borrowed from UK's article in Asgard 6:
ECL --- CR
1-20 --- +1/Level
21-40 --- +1/2 Levels
41-80 --- +1/4 Levels
81-160 --- +1/8 Levels
161-320 --- +1/16 Levels
This format can be continued indefinitely as ECL and CR increases.
UK and I are still debating the divinity issue, but that may be close to a resolution, although a few issues about our test still need to be gone over. Other than that, what do you all think? UK? (Don't worry about the divinity one for now, just tell me what you think about the rest.)