If you manage to kill full buff DL, I don't see your point of DL being a broken class. DL as tank cannot kill anyone same gears, if DL go damage it wont be any more tankier than you might think, just as squishy as SM (if you think SM is squishy π ). DL need STR and ENE for damage which mean it will have less VIT/HP, while class like SM can just go ENE for max damage, which mean more VIT/HP.
Also, not only SM need super items to shine, anyone that want to shine need super items (SM/DL/Kundun/GL/RF/SUM/Slayer)