What path/choices (so far) do you think will lead to the happiest ending with Cass?
What major decisions do you think you should make/avoid?
As many have said, it will most likely be the white "I can fix her" path. Or the green "We can be terrible together" path. Something like equality between the two. Although it's unclear whether this equality will even exist.
As for major decisions, everything is very complicated here. It's difficult to say how our decisions will influence the future. For now, the West's example shows that the loyalty of both sides is questionable. Cass's decision regarding the situation in the West was quite interesting. But again, it's unclear how these "Allies" will behave in the future.
This is what I do: On the white path, I remain neutral as much as possible in all matters and will hope that in the future I will be given the opportunity to kill everyone just to be on the safe side.
As for the green path, I hope that in the future we will be allowed to make decisions to maintain a balance between Cass and Elis.