Hello you cuties!
I did write an addon which basically automatically adds raid marks on your party members when you enter Arena.
Keep in mind, you cant set Raid Marks only if you have leader.
This addon is for Wrath of the Lich King (3.3.5)
If you have any suggestions feel free to post them.
Enjoy!
Download: https://github.com/Dreamzlol/ArenaRaidMarks