We went over this a few days ago in the guide thread.
ItemSet 133051
This set totals 100% -interrupt with perfect Taeon augments (-10% each; 101% with Tathlum +1), meaning that it's ~2% short of cap. You can obtain the remaining 2% and/or gain a bit extra to allow tradeoffs in other slots via the following methods:
-
dark ring or
diamond ring from gold chests in Abyssea Konschtat and Vunkerl, respectively. Up to 5% each.
-
aptus earring (up to 5%) via the Chocobo Key reward from Battaru Royale, or
magnetic earring from Apoc Nigh
-
parashu from Grimshell Shocktroopers II and
magic strap from T2 ZNM Reacton
-
karasutengu kogake from Plucking Wings
-SIR merits (2% each, up to 10% total)
There are a few sidegrade/downgrade pieces in various slots; you can easily find these via the power search function.