I feel like we could change the Votaries’ Set summoning to be more specific as they are the top tier faction to ally with. Perhaps with things like the Black hand (as they are by far the largest faction) you would just have to be smart and pay your way through their likeness. I feel like the Black Hand is such an oddity as I have seen Cannibals, Sophistication, and I could have sword I saw 2-3 different types of avatar worship. They could very well be a Mitraen group, but I have my thoughts of leaning towards Yog and in some cases Jhebbal Sag. I think I got a plan for each faction
Exiles: Ally through mutual trust and assisting them in survival. (Helping them fight off animals or another faction) or expand their small camps and help them gain better defenses (maybe giving them fences to work with or better armor)
Darfari Cannibals: Summon Yog on any faction for immediate trust gain. I see a huge goal of the Cannibals is to summon Yog, so if you do it they find mutual trust in you, feed them unconscious thralls, or trade them better tools to harvest with.
The Black Hand: Trade high amounts of Gold with their merchants, help defend their camps, or summon Yog or Jhebbal Sag on the Darfari/Dogs of the Desert.
The Dogs of the Desert: Summon Jhebbal Sag on any other faction for trust gain, deliver heads of animals you have killed for trade, bring unconscious thralls for rituals
The Relic Hunters: Summon Set on any other faction for trust gain, Interact with merchants at Supermeru, or deliver treasures to their nobility.
The Lemurians: Summon Derkuto (Or Dagon if ever added) on any other faction for trust gain, attempt to clear Xel-Hei for Lemurian Re-Colonization, display Lemurian heritage (even if not Lemurian ancestry)
The Heirs of the North: Summon Ymir on any other faction (Double against Forgotten), slaughter the Forgotten Tribe members, be a Nordheimer (Instant trust gain, but not enough for alliance)
The Forgotten Tribe: Kill the Heirs of the North encampments, trade Star Metal with merchants, attempt to gain favor through (inset name of conversation NPC from Forgotten tribe here), OR if Cromm is re-added summon Cromm on any other faction (Double against Heirs)
Votaries of Skelos: Summon Set against the Relic Hunters, trade obsidian with merchants, devout yourself as a Devotee of Skelos through Vathis the Hierophant.
Tell me your thoughts on these stipulations. Now this would also render each faction to have to be coded against each other if this was implemented.