5E high level monster design is just terrible. You have to look for different solutions than what's in the MM.
I admit I have limited experience with it at high level but I think some of the designs are off. We are playing 5.0 so I don't know if it's been addressed in 5.5. I have been a little surprised at how it has not been as lethal as I would have expected. I don't know if this was a deliberate design choice but I don't necessarily think it was a bad decision. I know that if you want to ramp things up it will take some work, but how many players really want that kind of game? I know a lot of DMs that do, but players? Not sure.5E high level monster design is just terrible. You have to look for different solutions than what's in the MM.
I admit I have limited experience with it at high level but I think some of the designs are off. We are playing 5.0 so I don't know if it's been addressed in 5.5. I have been a little surprised at how it has not been as lethal as I would have expected. I don't know if this was a deliberate design choice but I don't necessarily think it was a bad decision. I know that if you want to ramp things up it will take some work, but how many players really want that kind of game? I know a lot of DMs that do, but players? Not sure.
I don't know if this is true all the time. I am a big believer in personal stories, even at high levels. It doesn't have to be about saving the kingdom or world. Sometimes a demigoddess runs away from her arranged marriage to an Elemtal Lord to be eith her Fae Prince lover, and the PCs are caught in the middle.Number 1 thing about high level play....a sense of urgency.
At 5th level, its about saving a town. At 10th level, its about saving the world. At 16th level, its about saving the world....in an hour.
Time pressure should be constant in any situation that matters.
Yes, it is set up to seem scary/difficult to the PCs but, at least on paper, any decent party will blow through it. Paper tiger.We curb stomped it. I was genuinely surprised because the battle had all the setup for being very tough, if not deadly, but we just smashed it. I don't know if that adventure has a reputation for being easy, but it turned out to be less difficult in practice than I would have thought.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.