5e & 4+3 for 3 by me

Over at Blood of Prokopius, Dave suggests using 5e races and classes as grist for the "4+3" OD&D race and class framework. It is, first and foremost, an exercise in constrained and economical expression, sort of like haiku for worldbuilders.

Is applying this to settings I've already noodled around with a cheap post? Perhaps - I'm just stealing a concept and applying it in the laziest possible way - but then I haven't posted in forever and regret it. So cheap it is. 

Tlön

Cleric: Cleric (Tomb), Human
Fighter: Fighter (Samurai), Human
Magic-User: Wizard (Illusionist), Human
Thief: Rogue (Scout), Human
Dwarf: Barbarian (Wild Magic), Goblin
Elf: Warlock (Great Old One), Gith
Halfling: Artificer (Artillerist), Human

Niðavellir

Cleric: Cleric (Forge), Deep Gnome
Fighter: Paladin (Ancients), Centaur
Magic-User: Druid (Circle of Dreams), Wood Elf
Thief: Rogue (Arcane Trickster), Triton
Dwarf: Rogue (Mastermind), Human
Elf: Warlock (Fiend), Human
Halfling: Rogue (Soulknife), Human

NITЯRONIKΛ

Cleric: Bard (College of Whispers), Human
Fighter: Artificer (Armorer), Human
Magic-User: Artificer (Alchemist), Human
Thief: Rogue (Thief), Human
Dwarf: Barbarian (Storm Herald), Gnoll
Elf: Rogue (Assassin), Elf (Shadar-Kai)
Halfling: Rogue (Phantom), Warforged

Niðavellir

In 1937, Nazi sorcerers recruited into the Ahnenerbe from the Armenenschaft, Germanenorden, and Thule Gesselleschaft discovered another world, which they called Niðavellir after one of the worlds of Norse mythology. Their plans to use it - whether as a colonial frontier or source of occult wisdom - were cut short by ensuing events, and the parts of their research team that did not escape there were divided up by American and Soviet intelligence. Niðavellir became a secret front in the Cold War until both agencies, anticipating their liquidation, fled to it in 1979. It has been unknown to any major Earth government since then - although there have been rogue operations.