Since Meradion never made his compiled thing and vanished from the forums it seems, I'll do it.

Method: Container, How to gain access/Obtain - Location (Area)

Broken Valley / Sentinel Island area

Defenders of Aleroth
Weapon[spoiler]Chest, Complete 3 Prophecies from Sosostra - Broken Valley

Helmet
Trader Locke, Buy it - Black Boar Inn. (Broken Valley Village)

Armor
Trader Carlin, Buy it - Top of Lovis' tower (Broken Valley)

Leggings
Loot, Defeat Red orb challenge - West of Quarry Shrine (Broken Valley)
[/spoiler]

Rivellon Guard
Leggings: [spoiler]Trader Derk, Buy it - Broken Valley Village

Cuirass:
Chest, Defeat Lord Arben & Grab Key - Tomb (Broken Valley Village)

Warhammer:
Loot, Complete "Lost for Words" & Defeat the Demon - Near South Valley Shrine (Broken Valley)
[/spoiler]

Wild Dweller:
Leggings: [spoiler]Chest, Last Chest in Fire Trial - Temple of Doom (Bandit Camp (Broken Valley))

Helmet:
Chest, Grab Key on the Goblin Throne - Lost cavern near Chapel Shrine (Broken Valley)

Bow:
Chest, Mindread Robin in Black Boar Inn - South-East of West Valley Shrine (Broken Valley)

Armor:
Chest, Complete "Dragon No More" - Just as you arrive at Sentinel Island

[/spoiler]

Blood Echelon:

Leggings: [spoiler]Chest, Find the 3 Dragon Crystals outside & place in dragon statues - Maxos' Temple (Broken Valley)

Bracers:
Chest, Grab necklace (Jewelry Box) on alcove outside Lord Lovis' room - Penelopes' Grave South-East of West Valley Shrine (Broken Valley)

Sword:
Chest, Arrive in Lord Lovis' room - Lord Lovis' room (Broken Valley)

Armor:
Chest, Complete "Dragon No More" - Just as you arrive at Sentinel Island

Shield:
Chest, Mindread Naberius - Naberius'storage (Broken Valley)
[/spoiler]

Sentinel Island / Orobas Fjords area

Hunter:

Necklace: [spoiler]Loot, Kill Gehsniz - Broken Valley Fortress

Earrings:
Chest, Kali's Flying Fortress

Belt:
Chest - Vacca's Cave (Sentinel Island)

Bracelet:
Gwynn's chest, Mindread Gwynn - High Hall (Orobas Fjord)

Ring:
Raze's Flying Fortress.

Helmet:
Chest, You need Dragon-form - Boat in Tree-crown (Sentinel Island)

Cuirass:
Chest, Complete "Much Ado About Goblins" - Red Hammer Tribe (Orobas Fjord)

Gauntlets:
Corpse of Jack Bolton - Cliff under Camp Freedom Shrine (Orobas Fjord)

Leggings:
Chest, Get the key from other tower - Dragon Cliff Castle (Orobas Fjord)

Bow:
Trader Nicolas, Complete "The Runes of Wrath" - High Hall (Orobas Fjord)
[/spoiler]

Scorpion:

Necklace: [spoiler]Chest between Jonah & Beach Shrine, Complete "From Soup to Nuts" - Sentinel Island

Earrings:
Golden Chest, Keara's Fortress

Belt:
Blue Chest, Stone's Fortress

Bracelet:
Loot, Kill Imp boss - Imps' Lair (Orobas Fjord)

Ring:
Blue Chest, Kali's Flying Fortress

Helmet:
Loot, Complete "Down the Hatch" - Dragon Cliff Castle (Orobas Fjord)

Cuirass:
Trader, Buy it - Dragon Cliff Castle (Orobas Fjord)

Gauntlets:
Chest, Complete "Reaping the Seeds" - Primordial Cave (Orobas Fjord)

Leggings:
Trader, Buy them - Refugee-camp (Sentinel Island)

Sword:
Chest, Complete "Grave Robbers" & flip the switches - Lost Tomb (Orobas Fjord)
[/spoiler]

Aleroth Archmage:

Necklace: [spoiler]Chest, Grab Key from bottom TP-room - Barnabus' Lair (Orobas Fjord)

Earrings:
Chest, Grab Key from Skeleton above the lava-pit, - High Hall Mines (Orobas Fjord)

Belt:
Jewelry box (Charlies Treehouse), Mindread Charlie - Yggdrasil (Orobas Fjord)

Bracelet:
Chest, Kill Sassan's Minions for Key - Laikan's old study (Sentinel Island)

Ring:
Loot, Beholder Alutiiq - Depleted Ore Mine (Orobas Fjord)

Helmet:
Loot, Kill Rayhun - Broken Valley Fortess

Cuirass:
Trader Deodatus, Mindread Deodatus - Aleroth (Orobas Fjord)

Gauntlets:
Chest, Defeat the Boss - Well Cave (High hall(Orobas Fjord))

Leggings:
Chest, Solve the 3 books riddle - Depleted Ore Mine (Orobas Fjord)

Hammer:
Chest, Stone's Flying Fortress
[/spoiler]

Ulthring's Set

Helmet: [spoiler]Loot, Mindread & Defeat Kali - Kali’s Flying Fortress (Orobas Fjords)

Cuirass:
Loot, Mindread & Defeat Stone - Stone’s Flying Fortress (Orobas Fjords)

Gauntlets:
Loot, Mindread & Defeat Xanlosch - Stone’s Flying Fortress (Orobas Fjords)

Leggings:
Loot, Mindread & Defeat Raze - Raze’s Flying Fortress (Orobas Fjords)
[/spoiler]

Credits to everyone that submitted in this thread, more likely than not your info was used & some from myself.