I actually love both. As S4H said, nothing so gratyfing as to see Auron kill those losers just with one single swing of his gigantic sword...... but then again is so badass to do the same thing to the whole party with either Yuna or Lulu.....
But no one defeats Cloud when equipped the Slash-all materia. 9999 damage to all enemies with one single hit. Plus the evade materia and the counter attack materia, linked as well to the guard materia: there were some battles that I did not even touch a button as the enemies would attack so fast, but then Cloud would guard his friends, evade the enemi's attack, counter attack, and finish them all without letting me input any commands