Hello, i got a job shooting in Europe. Client will receive video footage. As it will be edited in the U.S., they asked to have it in NTSC. im filming on location + extra ledlight. I dont need lines in my footage. what are my best options?

for now i learned i can shoot in :

ntsc
30p
50 shutter speed

or

60p
100 shutter speed

i tested it and i dont have problems. My screen of the a7s and a6500 are making lines, but when filming they are gone.

Are there any other problems possible? any experiences? all info is welcome

grretings Peter