What is cool about Ninja class? (Adventure Quest)

Ninja Class

Level 1. Swift Slash. Single powerful attack which raises likelihood of hitting.
Level 2. Defense Bonus. (Passive.)
Level 3. Dark Aura. Makes any weapon attack a darkness one. Increases damage on darkness weapons. Overall, a waste of magic, unless you are seriously lacking in the weapons department.
Level 4. Spin Tactics. Four ranged attacks with lessened damage. Awesome.
Level 5. Dual Katanas. Fire and Ice attack. Useless, except against a very few enemies.
Level 6. Summon Ninja Tortoise. A mid-range darkness guest (avg. 10-15 HP attack.)
Level 7. Ninja Stars. Ranged Wind attack. Good, but not great.
Level 8. Resistance Bonus. (Passive.)
Level 9. Sui-Ka Cast. A freeze spell. Frozen enemies are great: not only do they lose a turn, but their Fire resistance is 200%!
Level 10. Ninja Death Strike. Averages 50 HP Darkness attack, but has 30% chance of massive Element X attack (300 HP!!)

Ninja class is great for adventurers because you get some cool abilities, including an automatic double attack. For Guardians, it is even better with the freeze and Ninja Death Strike. This used to be my favorite, but it lacks the damage potential that Beastmaster and Necromancer have (with the sole exception of Ninja Death Strike, which can eat up the magic at 150 MP per use.) It's still good for hand-to-hand against Darkness enemies, as it has an 80% Darkness resistance without a shield.