I think this is of no issue if we go to the most common selections u would be ok, as unfair as it is barb/monk takes less dmg compare to paper weights ie: DH/WIzzies and etc.. Since if u go with wizzie (CM build ), DH (tanks) etc,, you will have to spend alot more on their equips since their defense are no that fancy compare to the 2 most common tankers.
Edit: i play the under achievers more since theyre quite fun to see in action, though as i said and warned u it'll COST U ALOT!! No matter what especially if u throw some other popular stat choices the prices goes up++ as well, farming a3 u need these things to think about as well,