This post will be updated when more info comes out.
Before patch 7.2, you can upgrade your Class Order Hall followers to ilvl 850.
When 7.2 comes out, you can upgrade them to ilvl 900.
Now, most important thing here, is that you cannot upgrade your followers with the ilvl upgrades you have pre 7.2 Those works only to ilvl 850.
If you want to upgrade above 850, there will comes out new ilvl uprages when 7.2 is live, and it will only work with those items.
Other posts
- New Updates to the D.I.S.C. Belt in Overcharged Delves
- Updated Outdoor Gear Changes in 11.1.7
- Ultimate Guide to Preparing for Patch 11.2
- This comes in patch 11.2 - a Forecast
- Exciting update for Puzzling Cartel Chip on June 11
- Your Guide to the Dastardly Duos Event: Rewards, Gameplay, and More!
- Breaking Down the Mask System: Strategies, Combinations, and Tips
- HUGE Timewalking CHANGES coming in patch 11.1.7
- Major Loot System Changes and Bugs in Latest Update Explained
- Horrific Vision Rewards from All chests on All masks