Gold hero is doing 200% dmg of brigade atk. Brigade atk is also referred to army atk research or just infantry/cavalry/renged atk researchs?
I have spoken with the Live Support about this and it looks like the exact number is currently unavailable for players to know.
The 200% brigade attack you're referring to is 200% of only the troops that hero brings to the fight.
However, how mich attack that brigade does isn't known amd isn't listed anywhere a player is able to see.
I have opened a ticket with the Mobile Royale team aboit this concern and hopefully I will be able to provide more information in the future.
Dragon Tamer of DATC