I'm currently on Randall's path as an Iscari and I've got all his endings (including the special one. Rip my soul) except one ending. From what I've heard it's supposedly possible to become LA's leader so I've told Randal that I want to be that, hinted for the Iscari about new leadership, told the Mavvar that I'm going to unite LA and I got my reputation up with all three houses up almost equally.  But the option to start my rebellion or take over LA has never happened. I tried to even make a deal with Lazarus to kill off Andrei and declared Andrei at the end. But even after Andrei died, the Golgotha couldn't agree for the leader to be me? Even though I was supposed to get a leadership position from Andrei? I don't know if my personality is supposed to be something else or what's going on. 

Also, even after I side with the rebellion and they save me, I end up getting Andrei's end where I have the choice of saving Andrei or letting Lazarus kill him and Randall disappears.

And if I choose Iscari, I just end up dying even though my stats considerably rise up for Iscari after choosing them.

I have Version 13.

This are my stats and the options at the announcement scene before I choose a side: