Kyojuro Rengoku/Strategy

Strengths

•  Flame Hashira30% boost to ATKUnique modifier and 30% boost to Fire ATK.
  Starts battle with Lethal Attack Dodged (1 time)Can withstand lethal DMG (Leaves 1 HP / Can't be removed)
  . gives him a headstart of damaging performance, which raises his ATK by 30% and Fire ATK by another 30%. This is especially helpful without completed grid.
• His charge attack has Unworldly damage multiplier, which is appreciated both for beginners who need immediate offensive unit. It consumes ResolveDMG cap is boosted / Charge attack can be used (Consumed upon charge attack / Can't be removed)
  to activate though.
• ResolveDMG cap is boosted / Charge attack can be used (Consumed upon charge attack / Can't be removed)
  also increases his damage cap.
• Is a strong contender for Enmity-oriented party due to ResolveDMG cap is boosted / Charge attack can be used (Consumed upon charge attack / Can't be removed)
  refreshing every turn when he's below 25% HP thanks to  Undying FlameGain ResolveDMG cap is boosted / Charge attack can be used (Consumed upon charge attack / Can't be removed)
  Duration: Indefinite every 4 turns or at end of every turn when below 25% HP.
  10% boost to damage cap with ResolveDMG cap is boosted / Charge attack can be used (Consumed upon charge attack / Can't be removed)
  ..
• Can DelayReduce a foe's charge diamonds by 1
  a foe with  Second Form: Rising Scorching Sun500% Fire damage to a foe (Damage cap: ~630,000).
  Inflict DelayReduce a foe's charge diamonds by 1
  Base Accuracy: 100%. while dealing high damage.
• Able to protect all allies from incoming damage with 70% DMG CutTaking 70% less DMG
  Damage Cut reducing damage taken for all elements.
  Warning! Does not work for Plain Damage! from  Fourth Form: Blooming Flame Undulation300% Fire damage to all foes.
  All allies gain 70% DMG CutTaking 70% less DMG
  Strength: 70%Duration: 1 turn Damage Cut reducing damage taken for all elements.
  Warning! Does not work for Plain Damage!. for 1 turn.
•  First Form: Unknowing Fire700% Fire damage to a foe (Damage cap: ~800,000).
  Gain Guaranteed TAGuaranteed triple attack regardless of Triple Attack Lowered debuffs
  Duration: 1 turn . deals high damage in conjunction of 1-turn Guaranteed TAGuaranteed triple attack regardless of Triple Attack Lowered debuffs
  . The skill refreshes its cooldown after dealing Charge Attack.
• Starts the battle with Lethal Attack Dodged (1 time)Can withstand lethal DMG (Leaves 1 HP / Can't be removed)
  , which can keep him alive for longer.

Weaknesses

•  Fourth Form: Blooming Flame Undulation300% Fire damage to all foes.
  All allies gain 70% DMG CutTaking 70% less DMG
  Strength: 70%Duration: 1 turn Damage Cut reducing damage taken for all elements.
  Warning! Does not work for Plain Damage!. is on a long 7-turn cooldown, leaving gaps in party's defense.

Characters

• Athena can complement Rengoku's 70% DMG CutTaking 70% less DMG
  Damage Cut reducing damage taken for all elements.
  Warning! Does not work for Plain Damage! with her  Shield of the Gods: AigisAll allies gain 40% Wind CutWind DMG is cut 40%
  Duration: 1 turn Wind Damage Cut., Wind SwitchElemental DMG from foes turns into wind DMG
  Duration: 3 turns, and RefreshHP is restored on every turn
  Strength: 10% of max HP (Healing cap: 400)Duration: 3 turns., reaching 100% Damage Cut to protect allies from foe's deadly attacks. She also brings DelayReduce a foe's charge diamonds by 1
  in form of her  Glare of GlafkosInflict DA DownDouble attack rate is lowered
  Base Accuracy: 85%Duration: 180 seconds, BlindedAttacks have a slight chance to miss
  Base Accuracy: 90%Duration: 180 seconds, and DelayReduce a foe's charge diamonds by 1
  Base Accuracy: 100% on all foes., making them a great pair for parties in need of multiple sources of delay and damage cuts.

• Scathacha (Valentine) is able to solve Rengoku limited ResolveDMG cap is boosted / Charge attack can be used (Consumed upon charge attack / Can't be removed)
  with her  Follow Your HeartShieldNext ATK received will be ineffective for a fixed amount
  Strength: 25% of their max HP (Max: 5000)Duration: Indefinite to each ally worth 25% of their HP (Max: 5000)
  (Consumes 25% of each ally's max HP). Although it will take at least 5 turn or at worst 10 turn for the enmity set-up by her 1st skill alone, she will also be able to provide the necessary amount of protection via ShieldNext ATK received will be ineffective for a fixed amount
  .

Weapons

• Sol Remnant grants Bonus Damage on third hits, making it very appreciated by Rengoku due to his Guaranteed TAGuaranteed triple attack regardless of Triple Attack Lowered debuffs
  from  First Form: Unknowing Fire700% Fire damage to a foe (Damage cap: ~800,000).
  Gain Guaranteed TAGuaranteed triple attack regardless of Triple Attack Lowered debuffs
  Duration: 1 turn ., which resets its cooldown after every charge attack.

Summons

• Prometheus and Peridot Carbuncle (3★) can also complement Rengoku's 70% DMG CutTaking 70% less DMG
  Damage Cut reducing damage taken for all elements.
  Warning! Does not work for Plain Damage! to nullify incoming Wind damage completly.