I'm makin a barb in classic and I cant decide if i should use concentrate or beserk as my main attack. I'm gonna use ww as my secondary for sure and i sorta want to pummp up battle commands( the one that adds to mana and life, not sure if thats what its called), right now im using a maul but i could always switch to a hammer and shield if i really need the block for beserk. Anyways, what do u think? beserk or concentrate?

concentrate is better IMO

Both are very different skills. If you like Magic damage, go for berzerk, which is usually 1 hit kill on most things. Conc is better if you need to HIT things. I like Conc better too.