After much R&D I've figured out how to guarantee max vision spawn rate, resulting in virtually infinite back-to-back portals
For anyone farming primals, souls or bounty mats, I noticed that a pattern with certain areas I where you can trick the game into spawning more portals that you know what to do with. I've recorded the rates below for proof which players in chat can peer review. So far it looks consistently legit.
The primary condition is that it's the "last" run you do before bed. If this is the case you'll spawn so many portals that you simply cannot go to bed on time, and just when you thought you were finished, you'll spawn another one.
Data below:
| Area: | Spawn rate: |
|---|---|
| Cow Level | 100% |
| Tidal Cave | Every single time |
| Literally anywhere | You betcha |
As you can see, the data is infallible and the numbers don't lie.
Simply do a run before bed and you will most certainly miss your sleep deadline and sleep schedule because you finally get the portals that you didn't get when you actually had time to run portals.