How do you beat sepiroth in Kingdom Hearts

Boss: Sephiroth
HP: 3000
Difficulty: Incredibly Hard
Suggested Abilities:
Strike Raid
MP haste
MP rage
Second Chance

Now, sephiroth has been considered one of the hardest bosses in the entire game of kingdom hearts. I'll go over a few quick things you need to know about this fight. There are two weapons you can choose from to beat this fight. One: Oblivion
Two: Ultima Weapon. And the reccomended level for this fight is 75 or above. First, when you begin the fight, sephiroth will only use the attack where fire comes up from the ground, so do this: do a combo on him, then dodge roll or jump away. While you roll or jump, fire will come up from the ground. If he hurt you by hitting you before he did that attack and you got away from the fire, that would be a good time to heal. When he's done that attack, don't even bother running up to him. He'll just hit you and hit you over and over. And if he does, once you get out of that sticky mess, heal your self ASAP. After that, he'll either jump up to you and hit then jump away, or teleport behind you hit you, and teleport away again. After you get a few hits on him, he'll use an attack called Sin Harvest. In this attack, meteors start falling from the sky, and he is in the middle, but you can't hurt him. Use dodge roll to dodge the meteors. After you get a few hits on him afterwards, he'll start charging at you, in this situation don't panic and don't move, or he'll REALLY hurt you. Once he gets a few inches away from running up to you, he'll teleport and when he does, turn around ASAP. Or he'll hit you. After you get him on his last health bar, he'll use an unknown named attack where he starts combining all of his attacks together. Now notice, if this attack hits you, it will reduce MP to zero, and health to zero. But if you equip second chance, it will reduce MP to zero, and HP to 1. After that attack is done use a potion immedietly, then an ether. One you get health back and magic back, just use strike raid to finish the job. And one last thing, after he uses that final attack he'll just keep jumping and hitting very quickly. So keep a safe distance from him and just use strike raid to finish him. I really hope this helped, and good luck kicking his butt because you know how! GOOD LUCK.