Upper_Krust
Legend
Good morning to you and thank you for the reply! These will have to be quick reactions as I have to get to a meeting.
No hurry dave.

Quite a few things: resistances, immunities, saving throw proficiencies, and a whole host of features: avoidance, blood frenzy, constrict, damage transfer, magic resistance, nimble escape, pack tactics, parry, possession, etc.
All monsters should have some unique/interesting abilities and defenses as a counterbalance to player advantages/abilities/spells/items.
Are you saying you don't count legendary actions because they only act after another creatures turn? IMO, that is silly rules lawyering.
No I am saying I don't count them towards the average damage totals because it doesn't make sense to weaken a monster by ADDING Legendary Actions.
Additionally player character immortals will get Legendary Actions - can you imagine saying to the player, yes you can get this Legendary Action but I'm going to nerf all your attacks and spells by 33%, lol.
It is clear the intent is that the legendary actions are supposed to part of its standard attack routine.
Yes they didn't think that through clearly.
However, I've rewritten legendary actions to clarify that. If you don't count them then that means a legendary monster could potentially be much more dangerous than the calculated CR.
Who would have thought monsters would be dangerous at epic levels.

Unless you are not having legendary actions inflict any damage or conditions.
That would be silly.
I will have to wait and see I guess. I personally like the randomness of LA (depending on what you mean by randomness).
I mean the mechanical assigning of whether something should be a 1, 2 or 3 'action' Legendary actions
The dragons have the most boring LA because they are all the same, random - or a least unique - legendary actions are the best IMO.
You'll like my dragons.
...although fair warning, they are very dangerous.
I will have to wait and see.

OK, but that is only true if you are stuck with the idea that there is some golden CR.
I think there could be.
Like Orcus should be CR 26, no matter what difficult CR 26 actually is. That is just arbitrary IMO. Orcus should be the CR that allows him to be a badass. That could be CR 16, 26, or 76!
I think I have managed to create a solid CR framework so that I know CR 25-28 is where I expect something as powerful as a Lesser God.
So you would need to change the existing stat blocks to make it comply with your guidelines.
Only for individuals, so that they retain their inherent CR.
The HP and DPR guidelines in the DMG are made with the intent that they are modified by other things in the DMG. IF you remove the other things you invalidate that table in the DMG.
You are better just ignoring the secondary modifiers, borderline waste of time as regards determining the difficulty a monster will present.
Again, in your approach you still have to change the stat block of every high CR unique monster. You just have to change it to match your guide instead of the DMG guide.
How many unique monsters do epic campaigns require each session? One or two at most. DM just spends 5 minutes a pop checking the HP & DMG and they are good to go. I'm not asking anyone to "change the stat-block of every high CR unique monster". Just double check the ones you are planning on using.
The monsters in the book are the monsters in the book. If I want the demon lords to be stronger than the WotC version, they need to be remade whether it is your version of the CR guide or the official version of the CR guide.
5 minutes checking HP & DMG for a unique monster/deity is infinitely less annoying than recreating the entire stat-block from scratch.
In fact, I could take your version of monster and the only additional change I would need to make (and would make) is to recalibrate the CR to match the DMG guidelines.
Well you could do that if wanted to. D&D is very flexible.
They are, or could be, otherwise the same. There is no need to completely remade as you suggest. At least not anymore than how your system would need to remake them.
What challenge rating is a demon prince in your opinion?
I will have to wait and see, but on the face of it I have serious concerns about your CR guideline changes.
I will see, but I doubt it.It just seems like you are cutting to much to me. But I will reserve final judgement. I look forward to the book. Good luck!
I hope you'll like it.