This list is unofficial:
D=Drops
S=Spoils 1. Majestic recipes
1) Plate armour : TOI - Hallate's Guardian ( D), Platinum Guardian Prefect ( D)
2) Leather mail : Antharas Cave - Pytan ( D), Bloody Banshee ( S )
3) Robe : Forest of the dead - Bone Sweeper( D), Vampire Magician ( S )
4) Circlet : Beast Farm - Alpen Cougar ( D, S )
5) Guantlets : Argos Wall - Homunculus ( D)
6) Boots : Argos Wall - Buffalo Slave ( D), EyE of Watchman ( D)
2. Tallum recipes
1) Plate armour : TOI- Slaughter Bathin ( D), Mul's Knight ( S )
2) Leather mail : Anthras Cave - Malruk Berserker ( D)
3) Tunic : Forest of the dead - Corrupted Knight ( D), Resurrected Knight ( D), Trampled Man ( S )
4) Stockings : Forest of the dead - Corrupted Guard ( D), Slaughter Executioner ( S )
5) Helmet : Beast Farm - Alpen Buffalo ( S )
6) Gloves : Valley of saint - Judge of Light ( D), Wailing of Splendor ( D)
3. Dark Crystal recipes
1) Brestplate : TOI - Hallate's Warrior ( D), Platinum Tribe Soldier ( S )
2) Gaiters : TOI - Hallate's Knight ( D), Hallate's Commander ( S )
3) Leather mail : Antharas Cave - Plando ( D)
4) Leggings : Antharas Cave - Cave Howler ( D)
5) Robe : Forest of the dead - Trampled Man ( D, S ) Valley of saint - Alliance of Splendor ( S )
6) Helmet : Beast Farm - Alpen Buffalo ( S )
7) Gloves : Valley of saint - Punishment of Splendor ( D), Judge of Splendor ( D)
8) Boots : Beast Farm - Alpen Kookaburra ( D), Alpen Buffalo ( S )
4. Nightmare recipes
1) Armour : TOI - Platinum Tribe Warrior ( D), Bound Warrior ( D)
2) Leather mail : Antharas Cave - Pytan Knight ( D), Bloody Keeper ( S )
3) Robe : Forest of the dead - Requiem Lord ( D), Vampire Wizard ( S )
4) Helmet : Beast Farm - Alpen Cougar ( D, S )
5) Guantlets : Argos Wall - Gaze of Nightmare ( D)
6) Boots : Argos Wall - Sly Hound Dog ( D), Beast Farm - Alpen Kookaburra ( D, S )
7) Shield : Alpen Cougar ( D, S )