I agree, I farm herbs in Tiragarde Sound solo and in 1 hour I make ~4k if I 5 box farmed that’d be ~20k an hour. Doing BRF on each difficulty will get you ~9400g in about an hour according to https://www.dataforazeroth.com/calculator
Though I guess it depends on his team size. He’d have to run at least 3 characters to beat BRF but he said Mythic and not every difficulty so 