Prestige of the Papsque 7-1
Client: Gate Guard
Reward: None
Skippable: No
Items Needed: Ancient San d'Orian Tablet
If possible you might want to finish up The Sand Charm quest so you can have a map of Bostaunieux Oubliette. If not then it's fine. Once your rank bar is high enough, talk to the Gate Guard to pick up this mission. He'll tell you to go to the Cathedral and talk to Papsque. He's located on the very top floor of the cathedral.

After the cut scene with Papsque, you're now ready to take on the NM. Before that you'll need to gather at least two party of level 60s for this. It's highly unlikely that one party of level 60s can take this NM on.

Once you have your alliance or mini alliance, head over to Chateau d'Oraguille and go down to the jail area known as Bostaunieux Oubliette. Go straight for a bit then make a right turn and head straight pass a quest NPC and into a door. Inside the door you'll find a NPC guard there. Sneak yourself up first then talk to the guard in order to drop down into the sewers. The reason for sneak is that once you drop down, there will be a coupld of slime there. Now while you are inside the sewers make sure to keep sneak on at all times as everything there aggro to sound or low HP.

If you don't have a map then just follow the right wall, heading right at every opportunity, until you eventually zone into West Ronfaure. Do not drop down the cliff once you are in West Ronfaure or else you will have to repeat the whole procedure again on how to get to this area of West Ronfaure. As soon as you zone into West Ronfaure from the sewers you should see a ??? mark. Buff everyone up and get ready for a NM fight with Marauder Dvogzog. He's an orc and a monk at that. He's not hard until he decides to two hour with Hundred Fist. People might start dying when that happens. Try and counter with a Paladin Invincible once the NM uses Hundred Fists. There might be a couple of deaths here and there but you should be able to take this NM down. It is not recommended to have a Ninja tank this.

Once the NM is dead, examine the ??? again to get a key item, Ancient San d'Orian Tablet. Now return to Papsque to give him the tablet. Then talk to the Gate Guard again then head to the garden of Chateau d'Oraguille for the final cut scene.

 
 
The Secret Weapon 7-2
Client: Gate Guard
Reward: Rank 8 & 60 000 gil
Skippable: No
Items Needed: None
Accept the mission from the Gate Guard. Once that's done, the Gate Guard will tell you to investigate the BCNM circle in Horlais Peak. Just to be safe you might want to try talking to Halver too.

Gather a party of level 66+ together. In this party you have to make sure there's someone you can sleep the 5 NMs you are about to face. Other a BLM with sleepga 2 or a BRD. I prefer a BLM because with Elmental Seal+Sleepga 2, you can pretty much sleep all of the 5 NMs Orc from the start. You should have a back up sleeper in RDM.

Get your party up to the BCNM in Horlais Peak and enter the circle. Eat food and buff up before heading out. Approach where the NM Orcs are but not enough to get aggro. You'll notice that there are 3 Orcs and 2 Orcishwarmachines. The 2 Orchishwarmachines are the weakest of the group. The three Orcs you'll see are Darokbok of Clan Reaper (PLD), Derakbak of Clan Wolf (DRG), and Jagibod of Clan Reaper (RNG).

When you ready to fight, have the sleeper sleep the groups of Orcs. Then have the PLD pull and attack one of the Orcishwarmachines. The RDM should be watching out for any unslept Orcs incase the BLM or BRD miss them. Let the tank and melee take out the 2 Orcishwarmachines quickly. Once the warmachines are dead, try and focus on either that DRG Orc or the RNG Orc. It doesn't really matter which of the three Orcs you go next but you would prefer to leave the PLD Orc last because it takes longer to take him down. And you don't want to prolong a fight while there are still 2 Orcs left. Each Orcs will use their 2 hour so when fighting the Orc RNG, make sure the tank is at full HP all the time incase the RNG Orc decides to unload Eagle Eye Shot on the tank while his HP isn't as full.
The order that's best to kill is: 2 x Orcishwarmachines--->DRG Orc---->RNG Orc----->PLD Orc. Once you killed all of the Orcs, return to the Gate Guard to recieve your Rank 8 and gil.