If you're already completed Act 6 at least once and this is your Thronebreaker rank up, Hype. If you haven't completed Act 6 yet, I would honestly wait. If you have no clear cut obvious choice, I would hold on until you do, or until that rank up immediately buys your way into Thronebreaker. At that point, I would rank up your most useful cosmic. In my own personal opinion of the options you have that would be Hype.