Altar of Siena (B1F)

Introduction
Also known as "AOS1" this dungeon is difficult for players <150 however the drops can make it worth running. It is a relatively short dungeon and a party of 2-4 people is recommended depending on how strong the party members are.

Drops
Some of the better items that can drop in this dungeon include:
 * +7, Epaulets
 * Perfect crafted Redosmium grade weapons and armor
 * +6 Bracelets & Earrings
 * Slot Extender (High) & Slot Extender (Highest)

A comprehensive drop table is found at: Altar of Siena (B1F) Drop Table

Monsters

 * Bernunosya
 * Cituarsina
 * Parasited Hound
 * Polluted Bernunosya
 * Polluted Cituarsina
 * Umpra
 * Umpra the Strong
 * Umpra the Weak

Boss:
 * Angelo
 * Centrion Prideus
 * Glutto
 * Greedir
 * Lazine
 * Lustor
 * Zealru

Step by Step Walkthrough
Source: