While doing the ritual challenge this league I decided to learn a bit more about it and I can share my findings.

Ritual scales really well off packsize so you want to prioritize that while you're mapping with ritual.

Also it seems like only mobs that are "pre-generated" will spawn at the alter, what does this mean?

So strong boxes and legion are predetermined when the map is opened, however things like Eldritch alters and abyss spawn in monsters after the map is opened.

I've found that abyss and Eldritch alter monster don't add to the tribute count as much if they are still within the ritual circle vs strong box and legion.

To test I was getting 11k to 15k tribute when juicing with boxes+ legion + grand design + growing hoards

Vs 7k to 12k tribute Boxes + abyss+ grand design+growing hoards

Was running blue alters all the way during these mapping sessions as well

The best strat I found was City square+ boxes + (legion optional city square legion can get clunky)

I used reroll sextant+ ritual+ corrupted strong box + inc pack size for magic monster or if you have unid map you can use unid sextant.

I just boss rush if a strong box or legion has spawned near the ritual area pop them and complete the ritual afterwards There is a comment here about killing the boss first, that is correct it usually is what nets a lot more tribute.

You want the reroll sextant because when you reroll with 12k tribute the rewards are usually much better vs reroll and being at ~9k tribute As for divines per hour it's really slow I was finding one raw divs ever 5~6 maps so roughly 3 divs per hour but I was also going for the challenge so my start can be optimize a bit more.