None of the Ancients use a giant two handed golden hammer. Talic wields a fiery sword and shield and uses whirlwind. Korlic wields a polearm and uses leap attack. Madawc wields dual throwing axes and uses shout. I even checked their lore backgrounds on Diablo2.diablowiki.net and none of their backgrounds suggest the use of a two handed golden hammer.

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Q u o t e:
Those three are not ancients

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Right. They were chosen as protectors of Mt. Arreat by the Ancients.