• Determine Total Prof: how much displayed stat is needed to reach x1.68 elemental proficiency.
◦ TotalProf = PlayerLevel * 1.68
			 = (423) * 1.68
			 = 710.64

• Subtract out base elemental proficiency and boost from Eminent Elementalist perk (+10% elemental proficiency) to find how much displayed proficiency is needed on equipment.
◦ TargetProf = TotalProf - (PlayerLevel) (PlayerLevel * 0.1) -
 			 = (710.64) - (423.00) - (42.3)
			 = 244.7

• Convert TargetProf from displayed stat to base stat.
◦ TargetProf = 244.7
◦ ScaledStat = (1 + PlayerLevel / LevelFactor) * BaseStat    [https://ehwiki.org/wiki/Level_Scaling]
◦ TargetBaseStat = ScaledStat / (1 + PlayerLevel / LevelFactor)
		   = (244.7) / (1 + (423 / (250/7) )
		   = 19.05

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• Determine amount of forging on Staff and Robe needed to reach TargetBaseStat.
◦ StaffBaseProf = 6.04
◦ RobeBaseProf = 9.53
◦ EquipBaseProf = StaffBaseProf + RobeBaseProf
				= (6.04) + (9.53)
				= 15.57

◦ TargetBaseStat = EquipBaseProf * UpgradeFactor
  UpgradeFactor = 1 + 0.2 * ln(0.1 * ForgeCount + 1)   [https://ehwiki.org/wiki/Upgrade#Upgrading]
  TargetBaseStat = EquipBaseProf * [1 + 0.2 *ln(0.1 * ForgeCount + 1)]
  TargetBaseStat / EquipBaseProf = [1 + 0.2 *ln(0.1 * ForgeCount + 1)]
  (TargetBaseStat / EquipBaseProf) - 1 = [0.2 *ln(0.1 * ForgeCount + 1)]
  [[(TargetBaseStat / EquipBaseProf) - 1] / 0.2] = ln(0.1 * ForgeCount + 1)
  e^[[(TargetBaseStat / EquipBaseProf) - 1] / 0.2] = (0.1 * ForgeCount + 1)
  e^[[(TargetBaseStat / EquipBaseProf) - 1] / 0.2] - 1 = 0.1 * ForgeCount
  ForgeCount = [e^[[(TargetBaseStat / EquipBaseProf) - 1] / 0.2] - 1] / 0.1
  			 = [e^[[(19.05 / 15.57) - 1] / 0.2] - 1] / 0.1
			 = 20.57
			 ~ 21

• Doublecheck that ForgeCount is correct.
  TargetBaseStat = EquipBaseProf * [1 + 0.2 *ln(0.1 * ForgeCount + 1)]
				 = (15.57) * [1 + 0.2 *ln(0.1 * (21) + 1)]
 				 = 19.09
  19.05 ~ 19.09