I can't kill Sin!!

I can't kill Sin on the Mushroom Rock Road, can you guys give me some strategies like, who to fight with and good things to do?

You mean Sinspawn Gui?
Well I just kept beating him, healing my chars and casting spells on the head.

All you have to do is make sure Lulu gets Fira. That was you kick ass! Take out the head first, get wakka to throw his blitzball at the head too whenever it moves to avoid an awful attack! Also, fire up ALL overdrives!

use lulu's overdrive spells, yuna's healing, and aurach's power break and overdrive on the arms and head. :love:

You mean Auron?
Anyway, have Auron and Kimahri (seeing as these are the only two with Piercing at this point) take out the arms.
Make Wakka and Lulu target the head.
Once the arms are gone, they will regenerate evey three of the body's turns.
Pound on the body until then.
Have Auron and Kimahri repeat, this time with Lulu helping (only if the head is dead)
Repeat

also - if you want to train up your characters for the boss fight in this area you can by TKO from oaka by the tent. Its about 10,00 gil but well worth it if you want wakka to petrify fiends quickly - even works on garudas for high experience...