smn_resources on the Balance Discord has much info.

Some of it:

5.0 Endgame Beginner's Guide by Elevation Xx and Eydis Darkbane
https://docs.google.com/document/d/1...ebMAI75pEdkBdc

Tsundere Imouto's Stopgap Guide
https://docs.google.com/document/d/1...AWaLeIi_5q7Wig

Summoner 2 minute Cycle:
https://elevation.s-ul.eu/1X8CeZ0V