Weapon Affix

I personally go for a 6 to 7 slot easy-to-achieve affix. Adding damage like S1:Augment Intent is a common option, but I prefer increased PP efficiency, especially since Wand requires it.

Slot Name / Item Location Description
  S1: Photon Descent 2S1:光子縮減2S1:Photon Reduction 2S1追加:光子縮減2S1 Add:Photon Reduction 2 Endless QuestsUQ Masquerade Grants -10% PP Cost.
  S1: Goliathslayer's WillS1:強闘の志S1:Powering Intent Grants 104% damage to bosses.Considering most raid content is against boss, you can pick this as a cheap alternative to boost your damage.
  S1: PetalgleamS1:花ノ赤閃S1:Red Petal FlashS1追加:花ノ赤閃S1 Add:Red Petal Flash ★15 Hard Cross Bullet Increases damage by 3% for 30s after inflictiong 450K damageEffect resets when you swap weapon, even to another Petalgleam weapon.
  S2: Timeflow GraceS2:時流の恵S2:Flowing GraceS2追加:時流の恵S2 Add:Flowing Grace UH E-Trial RewardUH Mama-DeusPSO2es Quick Search Grants a persistent 10 PP regeneration every 4s.
  S2: Goliathslayer's WillS2:強闘の志S2:Powering Intent ★13 Mars Series Grants 103% damage to bosses.
  S2:Rainbow WillS2:六色の志S2:Rainbow's IntentS2追加:六色の志S2 Add:Rainbow's Intent Divide Quest Grants 105% damage if Petalgleam (Red Petal Flash) is active.Also works with any other Gleams.
  S3:時流の勇S3:Flowing CourageS3追加:時流の勇S3 Add:Flowing Courage UH Armada Grants automatic Shifta every 14s.
  S1: Goliathslayer's WillS3:強闘の志S3:Powering Intent White Day 2020 Grants 104% damage to bosses.
  S3: Axiom WillS3:活実の志S3:Vital IntentS3追加:活実の志S3 Add:Vital Intent ★15 Anacates SeriesUH E-Trial RewardUH Mama-Deus Grants 103% damage if HP is more than 80%.
  S3: Petalsea Song 2S3:花海雪の歌2S3:Nature's Melody 2S3追加:花海雪の歌2S3 Add:Nature's Melody 2 Divide Quest Grants a maximum of 107% damage over 15s if Petalgleam (Red Petal Flash) is active.Also works with Seagleam (Blue Ocean Flash) and Snowgleam (White Snow Flash).Currently very expensive.
  S4:強闘輝与S4:Colossal RadianceS4追加:強闘輝与S4 Add:Colossal Radiance UH Elder Grants a persistent 40 PP regeneration every 10s when there's a boss nearby.
  S4: Photon V AdaptationS4:輝器応変S4:Radiant Response ★14 Atlas Spear Grants increase in natural and active PP regen and reduce PP cost by (PP-120) * 0.1%.A powerful S4 if you chose to have a giant amount of PP.
  S4: Rainbow BalanceS4:六色の輝秤S4:Harmonized RainbowS4追加:六色の輝秤S4 Add:Harmonized Rainbow Grants 30% PP cut, but also reduces natural PP regen by 30% when Petalgleam (Red Petal Flash) is activeAlso works with any other Gleams.This increases your PP efficiency a lot, especially on an Ayer.
  S5: Skillful Adept WillS5:妙の巧志S5:Mysterious Intent ★15 Liberate Gunslash Grants 102% critical damage, Increases critical hit rate by +20%, and drains 1% damage dealt as HP (30 max).The HP recovery will not work on Et, but the critical rate boost and damage will still help on Dual Saber.
  S5: Lightning PursuitS5:雷光追撃S5:Thundering Pursuit ★15 Liberate Dual Blade Grants additional lightning-like attack when using PA.Only works on Dual Blade.
  S5: Steadfast HarpoonS5:静心衝杖S5:Calming Shockwave ★15 Liberate Wand Grants 102% damage, an additonal attack on Normal Attack 3, and negates hitstop.Only works on Wand.The additional attack is similar to Lavis Cannon and recovers 15PP.
  Persona Reverieペルソナ・レヴリーPersona Reverie Grants 40 ATK.
  Might VIパワーⅥPower VI ★14 Dim Series (Strike) Grants 45 S-ATK.
  Precision VIシュートⅥShoot VI ★14 Dim Series (Ranged) Grants 45 R-ATK.
  Casting VIテクニックⅥTechnique VI ★14 Dim Series (Tech) Grants 45 T-ATK.
  Astral Soulアストラル・ソールAstral Soul ★13 Ray series★13 Union series Grants 35 ATK, 35 HP and 5 PP.
  Phrase Decayフレイズ・ディケイPhrase Decay ★13 Basilis series Grants 105% damage against target with Jellen.More preferable for party-content as there's bound to be a Phantom or Luster in the area.
  Phrase Weakフレイズ・ウィークPhrase Weak ★13 Fornis series★13 Homura series Grants 102% damage against target with matching elemental weakness as the weapon.
  グランド・スピリタGrand Spirita特殊能力(グランドPP)Add Ability (Grand PP) Grants 15 PP.