I Need Help On Xenosaga

Well, a week ago I got a new PS2 since mine was broken and would cost more money to fix than to buy a new one. So anyways, I picked up Xenosaga because I heard it was great. I am now stuck at a certain boss. I am inside a gigantic gnosis, and am at the core,(around 12 hours and 30 minutes into the game) where I am at the Zohar and this gigantic Gargoyle and his two buddies (can't remember name, they look like slugs floating in the air) attack me. I don't know how to beat them because they deal ~200 damage a turn to my people through 2x Hell Rise or something. I was just wondering if there was a tip to beat them, because the Gargoyle regenerates his HP and it's deathly hard to beat the other two. Any advice?

I'm assuming you're at Gnosis Cathedral Ship.

That's not a really tough battle... Gargoyle is weak to lightning, and Oudogogues are weak to slash, and they have about 1/3 the HP of Gargoyle.

Take out the Oudogoges first, and yeah, Gargoyle will power-up and heal, but after you finish off both Oudogoges, you just need to focus on the main boss. Heal, Attack.

Which characters do you suppose I should use? I have been using chaos, Shion, and KOS-MOS. chaos's Heaven's Wrath Attack does ~250 damage, and KOS-MOS's attacks R-Cannon, R-Blade and R-Drill do ~300 damage. I was just wondering if I should use Ziggy at all. Otherwise I just figured a strategy to beat them, my brain just went dead for a few minutes I gusess.

What level are you?

In the last battle (well, you are far from that, but...), I use Kos-Mos, Shion, Jr.
For now, actually use whoever you want to... one good healer is enough, and pick two that can do damage effectively.

Ziggy has lightning attack, so he can be useful in this fight...

You are far from it. Many harder bosses ahead, my friend. If you're frustrated now, God knows what will happen when you reach Simeon(Albedo's Mech) or the half dozen other kickass bosses.

Personaly, I remember using for that battle, Shion, chaos, and Ziggy. Of course, Jr., Shion and MOMO were my "final team." For now, concentrate on boosting your A.G.W.S.' power. They'll help you survive for a short while longer.

Oh, and don't forget. if you are really stuck, CodeBreaker is your friend....

Hmm... I can't really say that game has a lot of tough bosses. I think I died once in a optional boss fight? Jr. vs Joe? But that's because I never saw it coming, and I was way too weak when I fought him.

AGWS wasn't all that useful at this stage, because they'd be too slow. And you know you're biased for not using Kos-Mos. Kos-Mos deals out the most damage, until Jr. joins. And Jr. will be the king of random encounter by then...

Still, in a boss battle, I found that Kos-Mos is most well-rounded character. With the skill transfer, she can deal out tons of damage, self-heal, and can take a lot of damage.