I recently attended a 34-player RTT, held by Mystic Games in Witney. Game 1 saw my World Eaters take on Scott's Dread Mob Orks. The mission was Take and Hold, with Hammer and Anvil deployment and hidden supplies (extra objective).
This tournament took place after the recent balance update, so those rules were in effect. However, the event was still using the Leviathan missions, as it was held very close to the release of the new missions cards and they couldn't guarantee that everyone could get a set in time.
My army consisted of:
Angron
Lord Invocatus
Master of Execution (Berserker Glaive)
Kharn
10 Berzerkers
5 Berzerkers
Rhino
Rhino
10 Jackals
10 Jackals
2 Spawn
3 Eightbound
6 Exalted Eightbound
3 Exalted Eightbound
I had made a couple of changes since the last tournament list thanks to the points drops in the recent dataslate. I was able to drop a unit of Eightbound, which gave me enough points to take Kharn and a second Rhino for the 5-man squad.
I like the Berzerkers, but the 5-man didn't really do a lot in my previous games. They don't have the damage output on their own, but are good for holding objectives. Adding Kharn would seriously boost their damage output, and the extra Rhino would be good for keeping them safe and getting them around the battlefield.