Game: Diablo II: Lord of Destruction
Location: Act V
Watch The Final Battle: Click Here
How To Beat Him: Use area attacks on Baal's minions, but don't bother dodging his tentacles or his nova spell. Pound on Baal incessantly so that he doesn't get a chance to summon his clone. If his clone shows up, ignore him and continue thrashing on the original; the clone's name is more 'centered' above him than the actual Baal. Be relentless, and don't give the devil his due.