More of our favorite heros stay alive, or win more because of luck then skill. Here are my examples: 1) Deidara choses to lure Naruto and subsequently Kakashi out into the forest setting up both one against two fights which give the heros the greatest chance of winning. 2) Haku decided to prolong the fight with Sasuke and Naruto instead of just killing them off. He avoided aiming for vital spots. 3) Hidan chooses to take them on one against four. If they both attacked, Shikamaru would not have had the time, he needed to analyze Hidan's attack. How many battles do you get where you get to sit and think about it in the middle of the fight. Where one enemy just stands around and watches. Up till now they fought all of their battles together even two on one. But now all of sudden they take them one of four, horray for luck. 4) Same thing goes for Oro's four who escorted Sasuke, they defeated Junnin together, but fought one on one and were defeated. Of course there are many more examples. If say Tsunade fought someone who uses poison she would be done for. She believes in the "Throw my body in the way" Jutsu and like Sakura would subcomb to the poisin and be enable to control their chakra and subsequently be unable to heal herself. So horray for LUCK in all its forms it keeps the story going.