Mass Ruckus Achievement
Equip elite items to all slots
There are a total of 7 slots you need to equip elite armor on. Elite armor items have a purple font color. You must obtain an elite Scythe, Secondary Weapon, Shoulder, Armor, Gloves, Boots, and Talisman. You can obtain these randomly from chests/enemies, or you may buy random elite items from Vulgrim's Shop. Buy the Ornate Box from him for 10,000 Gilt and 8 Boatman Coins. You can dashboard if you don't get the piece you need, or play around with it on a separate save since there are a limited amount of Boatman Coins in the game (100 total).
As you progress in the game, you may buy them from shops for a steep price. Therefore, it's actually pretty easy to obtain the gear if you have the funds. You can also trade with people in this thread HERE for the gear. Maybe someone will be nice if you're having trouble.