The Enderdragon is not tough actually. All you have to do is hit him once with anything (including your fist) and his damage is disabled. Now the only tough part is aiming at those Ender Crystals, though if you have good aim it is easy. As for the Endermen, always keep your head up and you are good. If you get attacked by one, just start chopping up its and it won't teleport away. More time-consuming than tough I say.
I know what you're thinking. "Did he fire six shots or only five?" Well, to tell you the truth, in all this excitement I kind of lost track myself. But being as this is a .44 Magnum, the most powerful handgun in the world, and would blow your head clean off, you've got to ask yourself one question: Do I feel lucky? Well, do ya, punk?
I've beaten the dragon before, after dieing nearly a dozen times. I had diamond armor when I won, and I used my bow and stacks of cobblestone to escape the platforms. Usually he'd just crash into the platforms and loose health while I pelted him with arrows. Whenevever I died it was because he slammed into me and sent my flying into lava.
I defeated the enderdragon with iron armour with no melee weapons or food( potions also) just a normal bow and bout 9 stacks of arrows.
I had a stone sword, food that I didn't use, and my brother when I defeated it, but I had absolutely no armor or enchantments, and only one stack of arrows. My brother was more poorly-equipped than I was.