Vulak`Aerr  

Vulak is special in that he will ALWAYS drop exactly 4 items (and 2 spells), and what it interesting is that he will pick one item from each of four "loot tables". Meaning he will never drop duplicates of an item or two items from the same table in a single kill. These loot tables are based on data from approximately 210 Vulak kills on the Phinigel server across multiple different guilds drop reportings. Actual percentages of droprates may vary slightly, as RNG will be RNG.

Credit goes to Korillo of Phinigel for compiling this data.

Loot Table 1
Sal'Varae's Robe of Darkness (26.09%)
Crystasia's Crystal Ring (22.71%)
Kelsiferous' Armband of Artistry (14.01%)
Solist's Earring of Insight (17.87%)
Ssra's Bloodstone Eyepatch (19.32%)

Loot Table 2
Abashi's Rod of Disempowerment (6.28%)
Valtron's Necklace of Wonder (15.46%)
Vyrinn's Earring of Insanity (16.91%)
Mrylokar's Dagger of Vengeance (16.43%)
Feeliux's Cord of Velocity (18.84%)
Brother Xave's Headband (7.73%)
Jaelen's Katana (18.36%)

Loot Table 3
Gharn's Rock of Smashing (9.18%)
Do'Vassir's Gauntlets of Might (19.81%)
Palladius' Axe of Slaughter (15.94%)
Maclaer's Boots of Silence (19.32%)
Camii's Bracer of Vigor (23.67%)
Tolan's Longsword of the Glade (12.08%)

Loot Table 4
Akkikrus' Mask of Warfare (21.26%)
Hobart's War Helmet (13.53%)
Viik's Pauldrons of Pain (13.53%)
Yakatizma's Shield of Crafting (16.91%)
Sirran's Boots of Insanity (18.84%)
Rowyl's Metal Armguards (15.94%)