Upper_Krust
Legend
Hi there Marshall! 
I beg to differ.
I actually rate the GWPD at CR 105.
I estimate a single 83rd-level character will only have 25% chance against it. (winning 1 out of every 4 such encounters)
On that we agree!
Actually there is; I have designed it. It takes me (approx.) 1 minute to determine any monster CR I would guess a few minutes for people unfamiliar with the system once they have read over it.

Marshall said:Dude, One(1) 83rd level Char, any class. Will wipe the floor with a great wyrm pris.
I beg to differ.
I actually rate the GWPD at CR 105.
I estimate a single 83rd-level character will only have 25% chance against it. (winning 1 out of every 4 such encounters)
Marshall said:Not that the CR is correct either,
On that we agree!

Marshall said:but there isnt a generic system that can account for all the variables needed to determine a reasonable CR without a spreadsheet and at least 20 min.
Actually there is; I have designed it. It takes me (approx.) 1 minute to determine any monster CR I would guess a few minutes for people unfamiliar with the system once they have read over it.