
I wanted to find places where you can get those kills fast, without the need to wait for respawn. These are the places I found where the enemies respawn faster than you can kill them. Of course there are other places, but these are the ones I used.
Construct
- Bthanual delve in Deshaan. It's a circle. Keep running the circle.
Daedra
- Bestial - Brothers of Strife, Stonefalls
- Humanoid - Court of Contempt, Coldharbour
- Flame Atro - the area between Willowgrove and Willowgrove Cavern in Reaper's March
- Storm Atro - the area between Willowgrove and Willowgrove Cavern in Reaper's March
- Frost Atro - the area between Willowgrove and Willowgrove Cavern in Reaper's March
- Flesh Atro - Abamath, Malabal Tor
- Air Atro - Spellscar, Craglorn
- Iron Atro - no idea
There's also plenty of atros in Craglorn.
Humanoid
- Humanoids - no need for anything special. Kill all humanoids you come across with.
- Goblin-kin - Dogeater Goblin camp, north-east of Stros M'Kai
- Giant-kin - Honeystrand Hill in The Rift
Nature
- Beasts - no need for anything special. Kill all animals you come across with.
- Insect-like - west of Sren-ja Wayshrine, Reaper's March, between Dawnmead Ruin Camp and Thizzini Arena. Greenshade would also be a good place.
- Lizard-like - the entirety of Shadowfen. (Ignore Lamias, they don't count)
- Plant-like - east and then north of Vulkwasten Wayshrine, Malabal Tor. Not directly north, but the north-south path that is east of Vulkwasten.
- Water-based - to east, down the hill from Serpent's Grotto wayshrine in Greenshade, or the Nereid lake in Craglorn, Snapleg Cave delve, The Rift.
- Chitinous - mudcrabs around the coastline of Khenarti's Roost
- Netches / Amorphous - all around Deshaan, Stonefalls
Undead
- Skeletons - The Corpse Garden delve, Deshaan
- Zombies - Quarantine Serk graveyard, Deshaan or Motalion Necropolis, Alik'r Desert
- Ghosts - Glenumbra Moors, Glenumbra
- Vampires - Moira's Hope, Rivenspire
Bonus tip for Challenge World Defender achievement
In Tamriel Tomes you have weekly challenges for world bosses. I was too late to get this idea, so I used this idea for the last 8 only, but it was much quicker this way. There are people camping those specific world bosses so you can ride from boss to boss and if you get the timing right, it's really quick. Every time a boss dies, go to the next one.
- Corintthac the Abomination, who appears at the Accursed Nursery in central Wrothgar
- Zandadunoz the Reborn, who menaces the Unfinished Dolmen in western Wrothgar
- Qumehdi and Zaman, liches who inhabit the Telesubi Ruins in Bangkorai.
- Macius Cento, a lich who beleaguers the Village of the Lost in Coldharbour.
- The Storm Atronach World Boss Zymel Etitan, who terrorizes Pelda Tarn in Greenshade
- The Storm Atronach World Boss Zymel Kruz, who dominates the Ancient Altar site in Stormhaven.