What is the ending of FFXII?

I had Cloud, Yuffie and Vincent in my party and was probably around level 50ish. As long as you have around 9k HP, you should be fine. Heal when you need to, use your limits when you have them, and summon if you can. It really wasn't that difficult for me, just keep your HP up and keep attacking when you can. That's all there really is to it.