[0.5] Update Deflection formula (#1937)

* update deflection formula to 0.5

* Update src/Modules/CalcDefence.lua

Co-authored-by: Edvinas-Smita <36479307+Edvinas-Smita@users.noreply.github.com>

---------

Co-authored-by: Edvinas-Smita <36479307+Edvinas-Smita@users.noreply.github.com>

Author: Peechey

src/Modules/CalcDefence.lua

@@ -49,8 +49,8 @@ function calcs.deflectChance(deflection, accuracy)
 	if deflection < 1 then
 		return 0
 	end
-	local rawChance = ( accuracy * 0.9 ) / ( accuracy + deflection * 0.2 ) * 100
-	return 100 - m_max(m_min(round(rawChance), 100), 0)
+	local chanceToNotDeflect = accuracy / ( accuracy + deflection * 0.12 ) * 150 - 50
+	return 100 - m_max(m_min(round(chanceToNotDeflect), data.misc.DeflectionChanceCap), 0)
 end
 -- Calculate damage reduction from armour, float
 function calcs.armourReductionF(armour, raw)

src/Modules/Data.lua

@@ -180,6 +180,7 @@ data.misc = { -- magic numbers
 	ResistFloor = -200,
 	MaxResistCap = 90,
 	EvadeChanceCap = data.gameConstants["DefaultMaxEvadeChancePercent"],
+	DeflectionChanceCap = 95, -- maybe a gameConstant?
 	DodgeChanceCap = 75,
 	BlockChanceCap = 90,
 	SuppressionChanceCap = 100,