Not going to lie, dose fit the bill. Worst bit is the fact that he pretty much plans on killing the rest of the party as well. Once Brand powers up the orb. As the once Mighty Tim curry once said.
"thank you commander, For so thoroughly and brutally dispatching my enemies. But now i am afraid, you have outlived your usefulness. You know, just enough to be a threat to me. And with that the future of the soviet republic. I will not say dosvedanya commander, as i will assure you. We will never meet again"
Note, the reason i am saying this. Is because if he wanted to keep Brand and Saida on his sided. Probably a bad idea to betray Roko right away. I think those two would have a wee bit of an issue with Him pretty much painfully erasing Roko soul and making it a hollow husk for an experiment. So chances are the arrangement he intended for was a very short lived one.