Hi kerrick mate!
Kerrick said:
If that's the case, how come the LAs and CRs vary widely in the MM?
The answer is easy to understand but convoluted to explain.
Simply because WotC do not rate CR properly, although the problem really stems from the inability to recognise the proper EL relationship.
Instead of balancing CR with Level they set it up to balance against a party of four characters of that level having a moderately difficult encounter. This is okay in itself; but the problems start to arise in that they still maintain 1 NPC Level = 1 CR.
So they have this flawed dichotomy wherein they claim a Pit Fiend is as tough an encounter as a single 20th-level NPC but has far greater ECL. So to them an 'effective' level is really a not an effective level - since otherwise it would be added to the monsters CR.
You have to rate NPCs and monsters under the same system. 1 CR = 1 Level = 1 ECL (which is the easiest method, and the one I have adopted).
Let me try and outline the dichotomy as simply as possible:
A Succubus is ECL 12 (according to WotC). But only CR 7.
A 12th-level PC is ECL 12. Whereas its also CR 12.
Surely an 'Effective Level' should mean just that. But as far as WotC is concerned it isn't.
Either ECL 12 should mean CR 12 or it should mean CR 7 - you can't have it both ways!
Kerrick said:
I can understand for things like unicorns - they can't use PC equipment, so we'll ignore non-humanoid creatures for the moment.
Okay.
Kerrick said:
Take the vampire or the lich as an example. The vampire's CR is +2, but the LA is +8. The lich is +2, and the LA is +4 (which anyone with half a brain would know is far too low). Where did they come up with these numbers? I really wonder if they're just guessing...
The problem is again that they don't understand the fundamental relationship between CR and EL. This frightens them into giving lower CR scores than they really should because they rate 1 CR = 1 EL. So anything +9 EL (which in their case wrongly means both CR and Levels) beyond the PCs is supposedly way too powerful - something I proved was totally incorrect.
Kerrick said:
You couild factor them in like with templates, since all creatures are supposed to use an array of scores; hence, each has bonuses and penalties added in, which can be tallied up and factored into the CR.
Unfortunately that brings us back to where we were six months ago in factoring ability scores - the problem we found then, was that its both pedantic and penalises PCs who roll high ability scores (essentially factoring/penalising luck) - which isn't really something you want to do.