As soon as I see Tavern brawler + Str monk, I don't take it seriously. That Larian feat version is ridiculously OP. Double Str to hit plus Stun? Nah that's just grabbing the no-brainer broken choice.
There's certain advantages solo'ing: you can concentrate best magic items, and swap them around to give maximum defences for any encounter, and generally focus all attention on your lone character. I recall having 2 characters shoved to death in that battle first playthrough.
Btw, if you watch her vid she did it on the 5th try. That's the opposite of proof it's too easy!
