I couldn't finish 'em. Looks like this's gonna get complicated.
Kactaar is an extremely powerful enemy in Crisis Core -Final Fantasy VII-.
Its sky high Vitality and Spirit make the Kactaar hard to defeat. The player can cast Graviga a couple of times, then continue with Costly Punch. It is best not to bother using normal sword slashes or magic. Be wary of when it is defeated, as it will use 10,000 Needles as its final attack!