If you want a list of addons to get:
1. Conslegion (levelling guide)
https://mods.curse.com/addons/wow/conslegion
A very nice one, but its only for Legion. If you want a guide for other xpacs, then get
http://wow-pro.com/addon
https://mods.curse.com/addons/wow/tomtom
The wow-pro addon is free and also comes with profession leveling guides and other stuff
2. Auctionator
https://mods.curse.com/addons/wow/auctionator
3. Gottagofast
https://mods.curse.com/addons/wow/gottagofast
Helps show the timer in mythic + dungeons
4. The undermine journal
https://mods.curse.com/addons/wow/undermine-journal
Needs to be downloaded once per week to update. Helps show good prices.
5. Handynotes
https://mods.curse.com/addons/wow/handynotes
https://mods.curse.com/addons/wow/ha...rarestreasures
Shows special items in the Broken Isles