wow that is insane dmg…i do not really understand how you get dmg that high…i have only been able to get my dmg too 250k base atk… 
Its because i spent a huge amount of time at studying affixes and their effects (theorycrafting) 
And as i said : to get these dmg i had to sacrifize some tankyness!
I’ve 2 builds :
An offensive one (70k hp and ~1500 allres) not enough tanky
A defensive one (400k hp and ~2500 alres 10k ar) not enough dmg
Maybe it would be better to be more hybrid… ill think about it!