Mine would be, I think, mid - high - high in sequence.Consensus on a single option? Probably not.
Consensus on a sliding scale for all those elements and maybe a half dozen common combinations? Probably.
If you think of Magic, Monsters, and CLNPCs (Class/Leveled NPCs) each ranging on a scale from None - Low - Moderate - High my own typical setting would be low in all three categories.
Cool! It is interesting to hear how other people have their settings.Mine would be, I think, mid - high - high in sequence.
You know, this reminds me of what I used to do in AD&D...The way I see it, these non-adventuring types can build up the same skills (a.k.a. levels) as can PCs provided they stick at it: it takes them much longer but usually at much less risk and probably at much less wealth accrual. Add in retired adventurers and yeah, CLNPCs are relatively common.
Adventuring is just the high-risk-high-reward means of gaining levels and wealth in a hurry.
Maybe you missed the Assassin (only 12 HD, but CR 8) or are you just looking at HD?The most powerful non-caster NPC is the Gladiator, at 15 HD (but only CR 5?).
FWIW, I equate CR 12 to about level 18, or roughly 2/3 of level equal CR. So, a 12th-level PC would be about CR 8.So Hit Dice seem to be rather arbitrarily assigned, presumably to get the hit point totals desired as opposed to being any real metric of overall power level. I could try to infer relative power level, that is, an Archmage is equal in power to a 12th-level PC, but that doesn't really mean anything. I'm still left with, how many CR 12s exist in the game? And the answer is "as many as a campaign needs".
But CR doesn't really map to character levels (unfortunately imo). If you have 4 PCs in a party and you throw 4 monsters of level-equivalent CR at them, by the encounter guidelines that's supposed to be a more than deadly fight. (In practice I find the encounters that PCs can handle to be much higher when I don't have a 6-8 encounters per day assumption in my games, but the intent was that CR and PC level are only roughly connected, not a 1 to 1 equivalence in levels)Oh yeah, I did skip over the Assassin. I saw their HD and missed their CR. And yeah, the CR system for 5e is just weird. One thing I hated about running spellcasting enemies in premade adventures is that they always had access to higher level spells than the party, which felt weird. "Yes, I know you're 5th level, but this CR 5 is able to chuck 4th level spells at the party."

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