What to do next?

Dav1d4

Hi all, I’ve just finished act 8.3 and I’m a bit lost on what to do next. I am yet to fully explore act 6, 7 and 8 but I’m not sure if that is worth all the time. I also haven’t completed any of carinas challenges as they look quite difficult and time consuming. Is there any recommendations on what area to focus on next? Any suggestions would be greatly appreciated, thank you