Shattered Village does the best damage overall. It just takes some practice to get the timing exactly right. Once you get used to it, it becomes trivial to do over and over again, even with berserker and warcry active.
Shattered Village is one of the easier combos to do because the timing is realy forgiving I've found. Usually you just have to let the first two swing animations play out and as soon as your frame tries to put the hammer away, hit your melee button or key of choice again and you should be getting into the Shattered Village combo. Once you do it once you can start experimenting around with the timing and then you'll probably end up doing it more and more
I press the melee key twice and then wait for the animation where the hammer swings like a baseball bat and when its pointing 45 degrees behind you from your right shoulder hit melee again and if u timed it right , the next swing will arc the opposite side u were facing, then just hit melee as fast as u can and u will do 2 spins. eventually u will learn to keep the spins going .I ant explain that part it just kinda becomes natural. This isnt the best explaination but i had a hard time at first and then its comes natural which makes it difficult to explain