If you're interested here is the information from .jp wiki concerning Nyzul Isle assault:
Main Nyzul Isle Assault page
Nyzul Isle Assault - Monster Appearance
Looks like after completing floor 100 you can choose new level 75 weapons like:
Code:
+---------------+-----+--------+-------+---------+
| Name | Job | Damage | Delay | Dps |
+---------------+-----+--------+-------+---------+
| Vorpal Sword | RDM | 39 | 224 | 10,45 |
| Wightslayer | BLU | 41 | 236 | 10,42 |
| Brave Blade | PLD | 44 | 264 | 10,00 |
| Double Axe | BST | 46 | 312 | 8,85 |
| Swordbreaker | THF | 27 | 200 | 8,10 |
| Dancing Dagger| BRD | 27 | 183 | 8,85 |
| Radiant Lance | DRG | 90 | 492 | 10,98 |
| Sasuke Katana | NIN | 33 | 227 | 8,72 |
| Windslicer | SAM | 76 | 450 | 10,13 |
| Sturdy Axe | WAR | 87 | 504 | 10,36 |
| Mage's Staff | BLM | 55 | 402 | 8,21 |
| Scepter Staff | SMN | 55 | 402 | 8,21 |
| Killer Bow | RNG | 36 | 288 | 7,50 |
| Quicksilver | COR | 31 | 480 | 3,88 |
| Burning Fists | MNK | 16 | 96 | 10,00 |
| Inferno Claws | PUP | 15 | 49 | 18,37 |
| Werebuster | WHM | 29 | 267 | 6,52 |
| Death Sickle | DRK | 90 | 528 | 10,23 |
+---------------+-----+--------+-------+---------+