Stuff here is still being updated and double checked. tho if you see something wrong send me a pm or have something to add
How to Get Relic~

Pre-requisites Needed
1. Complete Main Story and Class Quests(for the job you want relic for)
2. Access to Amdapor Keep

Relic Walkthrough
1. Speak to Nedrick Ironheart at Vesper Bay
2. Speak To Rowena at Revenant's Toll
3. Speak with Gerolt at Hyrstmill
4. Locate the broken quest weapon from the Beastmen

• Bard: Natalan
• Black Mage: U'Ghamaro Mines
• Dragoon: Natalan
• Monk: Zaha'rak
• Paladin: Zaha'rak
• Scholar: Sapsa Spawning Grounds
• Summoner: Sylphlands
• Warrior: U'Ghamaro Mines
• White Mage: U'Ghamaro Mines

5. Make your way back to Hyrstmill and present the timeworn relic to Gerolt
6. Purchase (or Craft) the class weapon and doublemeld it with specific grade III Materia. Can find this info further down the page

• Bard: Longarm's Composite Bow (Materia: Heavens Eye III)
• Black Mage: Sanguine Scepter (Materia: Savage Might III)
• Dragoon: Champion's Lance (Materia: Savage Aim III)
• Monk: Wilding Cesti (Materia: Savage Aim III)
• Paladin: Aeolian Scimitar (Materia: Battledance III)
• Scholar: Erudite's Picatrix Of Healing (Materia: Quicktongue III)
• Summoner: Erudite's Picatrix Of Casting (Materia: Savage Might III)
• Warrior: Barbarian's Bardiche (Materia: Battledance III)
• White Mage: Madman's Whispering Rod (Materia: Quicktongue III)

7. Deliver the materia-enhanced (Class Specific Weapon) to Gerolt.
8. Defeat the D'horme Chimera (Coerthas) while on the job that equips the relic weapon.
9. Obtain the "Amdapoor Glyph" from Amdapoor Keep.
10.Exchange with Rowena for "Interview with a Padjal".
11.Present this item to Gerolt to continue the quest.
12.Defeat twenty-four specific beastmen in the respective stronghold.

• Bard: Natalan - (8) Bloodwings, (8) Fogcallers, and (8) Windtalons
• Black Mage: U'Ghamaro Mines - (8) Quarrymen, (8) Bedesmen, and (8) Preists
• Dragoon: Natalan - (8) Bloodwings, (8) Fogcallers, and (8) Swiftbeaks
• Monk: Zaha'rak - (8) Lancers, (8) Pugilists, and (8) Archers
• Paladin: Zaha'rak - (8) Lancers, (8) Pugilists, and (8) Thaumaturges
• Scholar: Sapsa - (8) Shelfspine, (8) Shelfclaw, and (8) Shelftooth
• Summoner: Sylphlands - (8) Sighs, (8) Screeches, and (8) Snarls
• Warrior: U'Ghamaro Mines - (8) Quarrymen, (8) Roundmen, and (8) Bedesmen/Priests
• White Mage: U'Ghamaro Mines - (8) Quarrymen, (8) Bedesmen, and (8) Preists

13.Return to Hyrstmill and report your success to Gerolt
14.Armed with the unfinished (Relic Weapon), enter Halatali and defeat the Hydra
15.Back to Gerolt at Hyrstmill
16.Defeat all three primalson hard with the unfinished relic.
17.Away to gerolt!
18.Obtain a bottle of "Radz-at-Han Quenching Oil"

• Purchase the oil with 900 Allagan Tomestones of Philosophy in Mor Dhona.

19. Turn it in to Gerolt and you are done! yay!

Relic +1

1. Get/have a relic ^
2. Earn 900 Allagan Tomestones of Mythology
3. Purchase 3 Thavnairian Mist from Auriana in Revenant's Toll
4. Go to Hyrstmill and interact with the Forge near Gerolt. Exchange your Relic Weapon and the Mist for Relic +1

How to Make Prerequisite Melded Weapons

Bard: Longarm's Composite Bow
Crafter: Carpenter R50
Ingredients: 1x Spruce Lumber, 1x Bloody Bow Rim

Blackmage: Sanguine Scepter
Crafter: Goldsmith Rank-50
Ingredients: 1x Darksteel Nugget, 1x Pinprick Pebble

Dragoon: Champion's Lance
Crafter: Carpenter Rank-50
Ingredients: 1x Spruce Lumber, 1x Bloody Lance Head

Monk: Wildling's Cesti
Crafter: Leather-worker Rank-50
Ingredients: 1x Darksteel Nugget, 1x Bloody Cesti Covers

Paladin: Aeolian Scimitar
Crafter: Blacksmith Rank-50
Ingredients: 1x Darksteel Nugget, 1x Blunt Aeolian Scimitar, 1x Basilisk Whetstone

Scholar: Erudite's Picatrix Of Healing
Crafter: Alchemy Rank-50
Ingredients: 1x Enchanted Gold Ink, 1x Bloody Grimoire Binding

Summoner: Erudite's Picatrix Of Casting
Crafter: Alchemy Rank-50
Ingredients: 1x Enchanted Gold Ink, 1x Bloody Grimoire Binding

Warrior: Barbarian's Bardiche
Crafter: Blacksmith Rank-50
Ingredients: Darksteel Nugget, 1x Bloody Bardiche Head, 1x Basilisk Whetstone

Whitemage: Madman's Whispering Rod
Crafter: Alchemy Rank-50
Ingredients: 1x Growth Formula Delta, 1x, Thavnairian Mistletoe, 1x Vampire Plant

Where to Get The Hard to Find Stuff

Darksteel Ore: Dragonhead (Coerthas) Mining - Rare Node - 1:00 am Eorzea Time
Gold Sand: Drybone (Eastern Thanalan) Quarrying - Rare Node - 5:00 am Eorzea Time
Spruce Log: Dragonhead (Coerthas) Logging - Rare Node - 10:00 am Eorzea Time
Thavnarian Mistletoe: Dragonhead (Coerthas) Logging - Rare Node - 5:00 pm Eorzea Time
Vampire Plant: Dragonhead (Coerthas) Logging - Rare Node - 5:00 pm Eorzea Time
Trillium Bulb: Hawthorne Hut (East Shroud) Harvesting - Rare Node - 10:00 pm Eorzea Time

Blunt Aeolian Scimitar - Wanderer's Palace
Bloody Cesti Covers - Wanderer's Palace
Bloody Lance Head - Wanderer's Palace
Bloody Grimoire Binding - Wanderer's Palace
Bloody Bardiche Head - Wanderer's Palace
Bloody Bow Rim - Wanderer's Palace
Pinprick Pebble - Wanderer's Palace
In others words just go to Wander's Palace :P