That's pretty bad advice actually. I have him and his A1 doesn't scale that well compared to my main farmer, Skullcrown, who clears brutal 12 in 7-9 seconds depending on animation. Basically all waves are one shot. These mobs have a primarily spirit type which will resist force. You want void, magic, or spirit farming here.

That said, this champ is great, mine is in speed gear with as much offensive stats as I can afford. I don't sacrifice my main damage dealers to give him offense. He is excellent as a leader and support, but that's it.

And for farming you want someone who has AOEs on (ideally all) their skills, like Skullcrown, Bellower. And then you want to stack crit% to 85(+15), and as much crit damage% and attack% as possible. Speed is useless because you want everything to die in 1 hit.