NycterMoon

NycterMoon is a Vanilla server with AI Companions. 

The Companions are the best scripted bots you can find. They are capable of assisting you with clearing any content from questing, battlegrounds, dungeons or raids. The server has been in development for over 2 years and all the content has been successfully cleared by hundreds of players and dozens of groups, either solo, co-op or large raid groups. With the help of the Companions, you can fill in any spot in your group's composition whether you need a tank, healer or dps, the bots excel in all situations. Their rotations have been fine tuned and benchmarked against wow-logs raid timings. They also have a high degree of customizability, settings and commands so you can fine tune them to your playstyle. 

Here are some videos showcasing them:

Kel'Thuzad:
https://youtu.be/SjFqZ_aj9_Q
Sapphiron:
https://youtu.be/hjJQOoJOasc
Four Horsemen:
https://youtu.be/VUtRE5z92gU
C'Thun:
https://youtu.be/zhHKiotO1hQ
Twin Emperors:
https://youtu.be/R9dqt1_W9-A
Molten Core Solo Speedrun:
https://youtu.be/_4XO6UY5jPk
Blackwing Lair Solo Speedrun:
https://youtu.be/HVzYUHGvft4