Completely agree with this Mo’unga is the obvious 10, BB 15 and Dmac as 22Beauden Barrett definitely isn't the best 10 to play since Carter, like I think picking between him and Dan Biggar in their primes cones totally down to who you have around them, both Wales and NZ would have been worse off if they'd swapped nationalities at the age of 18. An absolute weapon in 2016 and 2017 when NZ were mostly still so dominant they could afford a luxury player at 10 but I can't really remember him ever grinding it out in that position.
15 is a different story, he was so so good on his day. Don't think NZ beat us in the last world cup with anyone else at 15, the way he could diffuse an attack or start one of his own with fairly subtle contributions whilst also being a gamebreaking threat himself was magic.
Tangentially, what's Richie Mo'unga's story? Missing link if I've ever seen one
Mo’unga has the control game neither BB and DM have