Critical hit rate calculation

[Sephyrias]

I know that it heavily depends on the luck stat and that it factors in how high your luck is compared to that of the enemy. So...
- how high is the chance to crit if both have 100 luck?
- how much does that chance increase or decrease with each point in luck?
- how many points in luck are equivalent to Murderous Glee (= crit chance multiplied by x2.5)?
- if the attacker has Murderous Glee and also more points in luck than the opponent, does having Murderous Glee increase the chance to crit by more than if both had the same amount and in the same vein, will having more luck than the attacker diminish the effect of their Murderous Glee?

[dustin1280]

*cough*
https://steamcommunity.com/sharedfiles/filedetails/?id=3279836265

[Sephyrias]

Alright so level differences play into the crit chance as well, not just luck values.
Let's do an example calculation with both at level 99 and 100 luck, no extra crit from skills.

Root = 110/110 = 1
Base = (109/109+1^2)*3 = 2*3 = 6
Crit rate = (0+6*1)*0.5*1*1 = 6*0.5 = 3%
Crit rate = (0+6*1)*0.5*1*1 = 6*1 = 6%

So that's a 3% 6% crit chance. Adding Murderous Glee would do this

Crit rate = (0+6*2.5)*0.5*1*1 = 7.5%
Crit rate = (0+6*2.5)*1*1*1 = 15%

Unless I did the math wrong, Murderous Glee only added 4.5% 9% chance to crit, that's not worth a skill slot at all.
Let's give the attacker 125 luck instead of 100.

Root = 125+10/100+10 = 1.22727
Base = (109/109+1.22727^2)*3 = 7.5186
Crit rate = (0+7.5186*1)*0.5*1*1 = 3.7593 %
Crit rate = (0+7.5186*1)*1*1*1 = 7.5186 %

with Murderous Glee
Crit rate = (0+7.5186*2.5)*0.5*1*1 = 9.39825 %
Crit rate = (0+7.5186*2.5)*1*1*1 = 18,7965 %

edit: fixed the math, I overlooked the "1 -" at the start of "Level Correction", so it is always base*glee*1 instead of base*glee*0.5. Still, the bonus crit isn't very high.