Let me try my skills at mindreading...
You're looking for a system where XP is flat (not dependent on PC level, like UA), but not determined by CR.
For example, a rust monster is CR 3, which determines his XP value in the default system and the UA system (one is dynamic, the other static) but what you want is...
5 HD Aberration = (50 XP x5) = 250 XP
SA: Rust 200 XP
SQ: Scent (100 XP), Darkvision (50 XP)
--------------------------------------
Total: 600 XP
Thost totals are determined by a list that would look something like...
HD Value
Aberration 50 XP/HD
Anaimal 15 XP/HD
Construct 75 XP/HD
...
SA
Breath Weapon, damaging: 20 XP/die of damage
Breath Weapon, debilitating: 500 XP
Frightening Aura: 400 XP
...
SQ
Incorporeal: 1,000 XP
Low Light Vision: 25 XP
DR, Silver: 10 XP/5 points
DR, Good: 40 XP/5 Points
SR: 10 XP per point of SR over 10.
...
You want it balanced to 3.5/Pathfinder's XP tables, but not to an encounters/level system like 3.5 uses.
Sorry, doesn't exist. Upper Krust's CR guide might help, but I don't think anyone's broken down the monsters like this since 2e...
Was I close?
YES!!!! You're Jedi Mind-Reading Skills have grown STRONG!
The ultimate answer I was trying to get at is---if I used a Pathfinder slow XP based game, where I awarded xp for both gold and magic items, how much XP is each monster worth, if I wanted to keep xp progression equivalent or close to how it was with AD&D?
Here is something I put together in a spreadsheet to help me get the basics down, and organize my thoughts. Feel free to add to it or use it.
I wanted to know, using a baseline common to all systems, how many kills does it take under each system to level? So I averaged all the 10 classes xp tables together to get an average AD&D XP needed for each level. I compared that to the Pathfinder slow XP chart, as well as 3.0/3.5's base xp table, on sheet 1 of the Excel Spreadsheet.
The next sheet breaks out, using orc XP as the common denominator, how many orc kills does it take to level under AD&D using AD&D orc xp as compared to Pathfinder slow progression using AD&D orc xp.
Next to that, as per the 3.5 DMG, is the 1/2 CR orc xp, to calculate under Pathfinder slow and the 3.0/3.5 XP tables, how many orcs does it take to level up each level? I could only do these to level 8, because beyond that level you dont get xp for such low CR monsters in 3.0/3.5. In AD&D even at 20th level you got 15 xp for an orc kill. As a total percentage of your xp at that level it was miniscule, since AD&D's xp needed for higher levels were massively more than what's needed in 3.0/3.5.
Lastly, since AD&D used GP and magic items kept as XP, I figured a good way to truly compare the systems on an "orc killed" basis is to deduct the XP gained from non-combat XP from the equation, to see how many orcs are truly needed to level in each system. That number is modifiable if you just change the percentage. I remember readig somewhere that in AD&D 20% of the xp gained came from combat, 80% from gp, magic items, and miscellaneous. That figure felt accurate from my memory of that game.
What I determined by doing this spreadsheet is that I basically could use the Pathfinder slow xp progression tables, and use the AD&D monster manual xp awards, in order to keep PF level progression close to AD&D. Pathfinder slow is harder than AD&D in the early levels, meaning it takes more orc kills to level, and easier than AD&D at later levels. Even that can be taken care of by using the percentage difference as a multiplier to the AD&D monster manual xp awards.
The only factors to take into consideration would be how certain monsters are much tougher in 3.5 relative to PC levels than they were under AD&D. In that case, since there is not a system like you outlined above (AD&D's system, basically ) to determine XP on a monster-by-monster basis for 3.5, I will just have to wing it, and add bonus xp where needed.
What do you think?
