ursa mini 4.6k anamorphic setup

hi. I am about to use a Blazar Great Joy 50 lens and I want to shoot anamorphic. what setup do you recommend? I was thinking about 4.6k 16.9. thanks
https://forum.blackmagicdesign.com/
https://forum.blackmagicdesign.com/viewtopic.php?f=2&t=214577