Hey yo! Wassup, UK?
I was just wondering . . . Are you gonna fix the rules for advancing monsters? The current rules break down very VERY quickly . . .
Take, for example, the Athach. HD 14, CR 7. Now, by the advancement rules, if you bump it up to HD 28, it is then CR 9. This, however, is utterly ridiculous. I took a Level 9 party up against one of these things and they barely made it out alive, having to use nearly all of their resources!
Another good example is the Solar. (Note: I am using UK's method of determining CR in this example, but the example is just as valid, if not more valid, using the original CR of the Solar.) HD 22, CR 25. Using the rules, bumping the Solar up to HD 44, it becomes CR 27. Certainly you would agree that this is more than a wee bit ridiculous?
For those of you who want to argue about the Solar's CR, here it is for you. HD 22, CR 19. HD 44, CR 21. Any questions?
For my final example, I will use Tarrasque. (Note: I am once again using UK's method.) HD 48, CR 24. By the rules, advancing it to HD 96 would make it CR 26. Anyone else have a problem with that?
For those of you wanting me to give another example using current rules, here's for you. HD 48, CR 20. HD 96, CR 22. Any questions?
Basically, the more HD a creature has, the more broken the system gets. The HD 28 Athach should be CR 13 MINIMUM. The HD 44 Solar should be at least CR 30, and the HD 96 Tarrasque should be a bare minimum of CR 33.