Map mobs vs map boss

My feedback for this one, i'm at the point now where i can clear a screen in seconds. I get to a map boss and quite often i will die during the 5 minute fight....
The boss literally takes no damage, all mys kills that require charges etc do not work and if i get hit once im dead.
There too greater gap between mobs (white of rare) to the boss'. I fiddle around with my build and think 'yeah this is working' to only get to a boss i cant get below 80%.
In 1.0 boss' still killed me but i could manage a 1-2 minute fight and the difference between mobs and boss felt right. In 2.0 this is WAY off for me.
Going to park the game until next patch and hopefully they can fix all this.