chart: how much extra att you need to be equal to 1 extra %stat

If InnerAbilityAtk = CharChardAtk = 0 cannot be assumed, the solution will be
TotalAtk * 4 * Main / (100+AtkPct) / (4*TotalMain + TotalSub)
= [Atk + (InnerAbilityAtk + CharCardAtk) / (100+AtkPct)] * 4 * Main / (4*TotalMain + TotalSub)

Bolded term is what changes, and Atk is +attack from gear & skills only.

 All Solutions

Code:

Range = Multiplier / 100 * TotalAttack * (4*TotalMain + TotalSub)
Range = C * TotalAtk * (4*TotalMain + TotalSub)                    # C = Multiplier/100

TotalStat = (BaseStat*(1+MW/100) + Skill + Equip)*(1+StatPot/100) + InnerAbilityStat + CharCardStat
TotalStat = Stat*(1+StatPot/100) + OtherStat                       # Stat = BaseStat*(1+MW/100) + Buff + Equips
                                                                   # OtherStat = InnerAbility + CharCard

TotalAtk = Atk*(1+AtkPct/100) + InnerAbility + CharacterCard       # AtkPct = AtkPot + Skill%
TotalAtk = Atk*(1+AtkPct/100) + OtherAttack                        # OtherAttack = InnerAbilityAtk + CharCardAtk

Range = C * [         TotalATk               ] * { 4 * [         TotalMain        ] + TotalSub }
      = C * [Atk*(1+AtkPct/100) + OtherAttack] * { 4 * [Main*(1+MainPot/100)+OtherMain] + TotalSub }
                



dRange/dAtk = C * (1+AtkPct/100) * (4*TotalMain + TotalSub)
dRange/dAtkPct = C * Atk/100 * (4*TotalMain + TotalSub}
dRange/dMain = C * TotalAtk * [4*(1+MainPot/100)]
dRange/dMainPot = C * TotalAtk/100 * (4*Main)

dRange/C = [(1+AtkPct/100) * (4*TotalMain + TotalSub)] * dAtk
         = [Atk/100 * (4*TotalMain + TotalSub)] * dAtkPct
         = [TotalAtk * 4 * (1+MainPot/100)] * dMain
         = [TotalAtk/100 * 4 * Main] * dMainPot





1% Atk = [Atk/100 * (4*TotalMain + TotalSub)] / [(1+AtkPct/100) * (4*TotalMain + TotalSub)]           Atk    
       = Atk / 100 / (1+AtkPct/100)
       = Atk / (100+AtkPct)

1 Main = [TotalAtk * 4 * (1+MainPot/100)] / [(1+AtkPct/100) * (4*TotalMain + TotalSub)]               Atk*
       = [Atk * (1+AtkPct/100) * 4 * (1+MainPot/100)] / [(1+AtkPct/100) * (4*TotalMain + TotalSub)]
       = [Atk * 4 * (1+MainPot/100)] / [(4*TotalMain+TotalSub)]
       = 4 * Atk * (100+MainPot) / 100 / (4*TotalMain+TotalSub)
       = Atk * (100+MainPot) / 25 / (4*TotalMain+TotalSub)

1% Main = [TotalAtk/100 * 4 * Main] / [(1+AtkPct/100) * (4*TotalMain + TotalSub)]                   Atk*
        = [Atk * (1+AtkPct/100) + OtherAttack] / 100 * 4 * Main] / [(1+AtkPct/100) * (4*TotalMain + TotalSub)]
        = [Atk/100 * 4 * Main] / [(4*TotalMain + TotalSub)]
        = 4 * Atk * Main / 100 / (4*TotalMain + TotalSub)
        = Atk * Main / 25 / (4*TotalMain + TotalSub)



1 Atk = [(1+AtkPct/100) * (4*TotalMain + TotalSub)] / [Atk/100 * (4*TotalMain + TotalSub)]            %Atk
      = (1+AtkPct/100) / (Atk/100)
      = (100+AtkPct) / Atk

1 Main = [TotalAtk * 4 * (1+MainPot/100)] / [Atk/100 * (4*TotalMain + TotalSub)]                      %Atk*
       = [Atk * (1+AtkPct/100) * 4 * (1+MainPot/100)] / [Atk/100  * (4*TotalMain + TotalSub)]
       = [(1+AtkPct/100) * 4 * (1+MainPot/100)] / [1/100  * (4*TotalMain + TotalSub)]
       = [(100+AtkPct) * 4 * (100+MainPot)] / [(4*TotalMain + TotalSub)]
       = 4 * (100+AtkPct) * (100+MainPot) / (4*TotalMain + TotalSub)

1% Main = [TotalAtk/100 * 4 * Main] / [Atk/100 * (4*TotalMain + TotalSub)]                            %Atk*
        = [TotalAtk * 4 * Main] / [Atk * (4*TotalMain + TotalSub)]
        = [Atk * (1+AtkPct/100) * 4 * Main] / [Atk * (4*TotalMain + TotalSub)]
        = [(1+AtkPct/100) * 4 * Main] / [(4*TotalMain + TotalSub)]
        = [(100+AtkPct)/100 * 4 * Main] / [(4*TotalMain + TotalSub)]
        = 4 * (100+AtkPct) * Main / 100 / (4*TotalMain + TotalSub)
        = (100+AtkPct) * Main / 25 / (4*TotalMain + TotalSub)



1 Atk = [(1+AtkPct/100) * (4*TotalMain + TotalSub)] / [TotalAtk * 4 * (1+MainPot/100)]                Main*
      = [(1+AtkPct/100) * (4*TotalMain + TotalSub)] / [Atk * (1+AtkPct/100) * 4 * (1+MainPot/100)]
      = [(4*TotalMain + TotalSub)] / [Atk * 4 * (1+MainPot/100)]
      = [100 * (4*TotalMain + TotalSub)] / [Atk * 4 * 100 * (1+MainPot/100)]
      = [100 * (4*TotalMain + TotalSub)] / [Atk * 4 * (100+MainPot)]
      = 25 * (4*TotalMain + TotalSub) / Atk / (100+MainPot)

1% Atk = [Atk/100 * (4*TotalMain + TotalSub)] / [TotalAtk * 4 * (1+MainPot/100)]                      Main*
       = [Atk/100 * (4*TotalMain + TotalSub)] / [Atk * (1+AtkPct/100) * 4 * (1+MainPot/100)]
       = [1/100 * (4*TotalMain + TotalSub)] / [(1+AtkPct/100) * 4 * (1+MainPot/100)]
       = [(4*TotalMain + TotalSub)] / [(1+AtkPct/100) * 4 * 100 * (1+MainPot/100)]
       = [(4*TotalMain + TotalSub)] / [(100+AtkPct) * 4 * (100+MainPot)]
       = (4*TotalMain + TotalSub) / 4 / (100+AtkPct) / (100+MainPot)

1% Main = [TotalAtk/100 * 4 * Main] / [TotalAtk * 4 * (1+MainPot/100)]                                Main
        = [1/100 * 4 * Main] / [4 * (1+MainPot/100)]
        = [1/100 * Main] / [(1+MainPot/100)]
        = [Main] / [100 * (1+MainPot/100)]
        = Main / (100+MainPot)



1 Atk = [(1+AtkPct/100) * (4*TotalMain + TotalSub)] / [TotalAtk/100 * 4 * Main]                       %Main*
      = [(4*TotalMain + TotalSub)] / [TotalAtk / (1+AtkPct/100) /100 * 4 * Main]
      = [(4*TotalMain + TotalSub)] / [Atk / 100 * 4* Main]
      = [100 * (4*TotalMain + TotalSub)] / [Atk * 4* Main]
      = 100 * (4*TotalMain + TotalSub) / 4 / Atk / Main
      = 25 * (4*TotalMain + TotalSub) / Atk / Main

1 %Atk = [Atk/100 * (4*TotalMain + TotalSub)] / [TotalAtk/100 * 4 * Main]                             %Main*
       = [Atk * (4*TotalMain + TotalSub)] / [TotalAtk * 4 * Main]
       = [Atk * (4*TotalMain + TotalSub)] / [Atk * (1+AtkPct/100) * 4 * Main]
       = [(4*TotalMain + TotalSub)] / [(1+AtkPct/100) * 4 * Main]
       = [(4*TotalMain + TotalSub)] / [(100+AtkPct)/100 * 4 * Main]
       = [100*(4*TotalMain + TotalSub)] / [(100+AtkPct) * 4 * Main]
       = 100 * (4*TotalMain + TotalSub) / (100+AtkPct) / 4 / Main
       = 25 * (4*TotalMain + TotalSub) / (100+AtkPct) / Main

1 Main = [TotalAtk * 4 * (1+MainPot/100)] / [TotalAtk/100 * 4* Main]                                  %Main
       = [(1+MainPot/100)] / [1/100 * Main]
       = [100 * (1+MainPot/100)] / [Main]
       = (100+MainPot) / Main


*OtherAttack is assumed to be 0 in all cases. If this is not true no simplifications are possible, and the final solution will be the term on line 1.