How to beat Gilgamesh!

Final Fantasy XIII-2: Gilgamesh (3:47)
Coliseum DLC

Opponent - Gilgamesh
HP - 9,999,999
Common Drop - Power Crystal
Rare Drop - Genji Glove


Serah:
Weapon - Gandiva (Chain Bonus Lv 5)
Accessories - Durable White Cape (75/100), Delicate Magician's Mark (25/100)

Noel:
Weapon - Grasitha (Chian Bonus Lv 5)
Accessories - Durable Pain Dampener (75/100), Delicate Power Wristband (25/100)


Paradigms: (Serah - Noel - Monster)
Cerberus (N) ---------------------------- COM COM COM (Chichu)
Cerberus (N) ---------------------------- COM COM COM (Chichu)
Smart Bomb (N) ------------------------ SAB RAV RAV (Cloudburst)
Relentless Assault (N) ------------------ RAV RAV COM (Chichu)
Mystic Tower (N) ------------------------ RAV RAV SEN (Goblin Chieftain)
Solidarity (N) ---------------------------- COM MED SEN (Goblin Chieftain)


Hardly a strategy here other than build his chain using Ravagers and then Cerberus him to death. Few things to note though:

1. Once you're close to staggering him, say around 240%, use Goblin's Feral Link. That will give you all the necessary buffs except En-spells.

2. As soon as he staggers, use your debuffs. All three, Deprotect, Deshell & Imperil will stick in one turn.

3. Immediately after finishing your command for the debuffs, use Cloudburst's Feral Link which should give you those missing En-spells.

4. Then switch to Relentless assault for one turn. That should take his chain to around 650%, which is enough for Chichu to be hitting 90,000+, if his HP is high.

5. In your first Stagger, limit your damage to around 5 Million HP. You don't wanna get below that, or he'll use Enhance Power mode after he recovers. The limit could be at 4.5 Mil HP, as I tested him at 4.3 Mil, and he used Enhance Power. It should be either of those figures, but should only account for a difference of 5-7 seconds.

6. Now, after he recovers from first stagger, he'll be a little more aggressive but not crazy like the Enhance power mode. Use RAV RAV SEN more in this period to build his chain, and heal if needed in COM MED SEN.

7. Follow the same steps when you are about to stagger him, and go all out once he is staggered. This time, it is important that Chichu doesn't get hit with Pain.
You can do 6+ million damage in one stagger, so you are more than capable of finishing him off.


Other Comments:
Use Remedies, Painkillers & Wound Potions if needed, even though I didn't need any items in this battle except a Librascope.
Do make sure that all your monsters have their feral links charged before going into battle.

Here is the video for reference:

ALL HAIL RAIN!!

Also quick question, why did you use Noel as the Medic and Serah as the Commando? Not bashing, I'm just curious of the strategy.

Scott Hmm that is a very good reason.

quote R a i n

So expect times of under 3 min to be the best

switching between them gives you a full bar at times.
makes you attack non-stop.

Just tried this and failed miserably. My monsters clearly aren't good enough. I have a max level Chichu, Cloudburst and Goblin Chieftan but I still got owned when he went into enhanced power mode.

hey i want to build my goblin chieftain to have these abilities on it. can i get step by step instructions for the monsters needed and their level and the order to infuse?
feral speed II
Improve Ward
Resist Elements +30%
Rapid Recovery
HP +30%
Resilence +40%
Resist Magic +36%
Resist Physical +36%

Ondoy

There are a few things than can be messing up your damage. Does your Chichu have Role Resonance? If so, are you using a COM COM COM paradigm there? What is Gilgamesh's Chain Meter say? Should be around 700% to get 99,999 damage.
Also, Chichu's HP should be nearly full, or alteast >70% because of Adrenaline ability. That gives a 20% boost to STR.

quote EragonFanatic2007

hey i want to build my goblin chieftain to have these abilities on it. can i get step by step instructions for the monsters needed and their level and the order to infuse?
feral speed II
Improve Ward
Resist Elements +30%
Rapid Recovery
HP +30%
Resilence +40%
Resist Magic +36%
Resist Physical +36%

Monster-----: Goblin Chieftain
Monster Role: Sentinel

The Build:
01) Improved Guard II (RL)
02) Defense Maintenance (RL)
03) HP +30% (YL)
04) Feral Speed II (YL)
05) Improved Ward (YL)
06) Resist Elements +30% (9)
07) Rapid Recovery (8)
08) Resilience +40% (8)
09) Resist Physical +36% (7)
10) Resist Magic +36% (7)

Monster Materials to use: All Vitality.

Crystarium Bonus: +1 SEN Bonus Boost.

Gather these Monsters:
01) Lv40 Goblin Chieftain
02) Lv20 Lancer
03) LV20 Lancer
04) Lv33 Caterchipillar
05) Lv99 Flandit
06) Lv23 Mewmao
07) Lv72 Necrosis
08) Lv24 Microchu
09) Lv48 Green Chocobo

Infuse in this order:
01) Lv40 Goblin Chieftain <--Lv20 Lancer
02) Lv40 Goblin Chieftain <--LV20 Lancer
03) Lv40 Goblin Chieftain <--Lv33 Caterchipillar
04) Lv40 Goblin Chieftain <--Lv99 Flandit
05) Lv40 Goblin Chieftain <--Lv23 Mewmao
06) Lv40 Goblin Chieftain <--Lv72 Necrosis
07) Lv40 Goblin Chieftain <--Lv24 Microchu
08) Lv40 Goblin Chieftain <--Lv48 Green Chocobo

Then infuse him with 18 levels worth of MED monsters (Cait Sith) until Reprieve is learned.