A similar, more complete guide can be found here on XIVPads
AF Weapon Guide: on XIV PadsStep 1 - Earn 25,000 seals and buy the key item "On the Properties of Beastment"
Step 2 - Obtain Inferno Seal x3, Tremor Seal x3, Vortex Seal x3 from Rank 2 Hamlet (gold chest requiring 60K+ scores)
Step 3 - Talk to Rowena and Exchange for a Soiled Promissory Note
Step 4 - Go to Gerolt and start Quest "A Relic Reborn"
Step 5 - Gather HQ mats and craft or buy Class-Only Weapons (prefferably HQ)
Step 6 - Double meld the gear with 2 Teir IV Materia of a specific Type as follows:
PLD = Mailbreaker + ? (Most Likely +HP based on AF stats)
MNK = Avengers + Manathirst IV (+MP)
WAR = Rampager + Touch of Rage IV (Emnity)
DRG = Obelisk + Savage Might IV (Crit Attack)
BRD = Sarnga + Heaven's Eye IV (Accuracy)
WHM = Alkaurops + ? (Most likely Mind based on AF stats)
BLM = Astrolobe + Hell's Fist IV (Magic Potency)
Step 7 - Kill chief NM of one specified Stronghold.
PLD =
MNK = Flamefist in Zaha'rak
WAR =
DRG =
BRD =
WHM =
BLM =
Step 8 - Gather 3 Materials from 6th Chest available at end of AV and CC Run
Items: Miser's Mythril (Aurum Vale), Alumina Salts (Cutter's Cry)
Step 9 - ?