Most important part of Sani Sabik RP?
Imho:
1. Usage of blood in the majority of their rituals. Followers view blood as the essence of life and spirituality and believe that it has mystical powers.
2. The belief in 'savants'. (Usually anyone strong enough to enforce the view that they are 'savants'.)
3.The belief that that immortality is attainable through adherence to the Sani Sabik rituals.
In general I'd argue that Sani Sabik follow a 'Might makes Right' philosophy.
I'd deny that theology, that is the systematic and rational study of concepts of God and of the nature of religious truths, is of any major importance to the Sani Sabik at large: Just like most Amarr aren't theologians.
What is in my opinion important - in contrast to theology - to Sani Sabik RP is religion, in the sense of an organized collection of beliefs, cultural systems, and world views that relate humanity to an order of existence (in this case, I'd argue, the rule of the strong over the weak and the imperative of acquiring strength).
I personally think that Sani Sabikism is in fact a 'theology-averse' religion, in the sense that the leaders wouldn't see any need to justify their teachings on grounds of rationality: They simply have the power to enforce their teachings, or their teachings are kind'a worthless by Sani Sabik standards anyway. The only reason Sani Sabik might have for 'theology' is in acquiring new followers for their cult, but there they seem to usually prefer the guise of foreign theology and the simple temptation that consist in acquiring and then unlimited use of power.