The ring event that came with Chaos

Assuming normal attack (100% damage) and x1.35 Critical damage (mean),

Since Max Damage = 1.20*(4 * STR + DEX) * (WA / 100),

1.20*(4 * STR + DEX) * ((WA + 2) / 100) * 1.15 > 1.20*(4 * STR + DEX) * ((WA + 3) / 100) * 1.10
((Max Damage) + (4 * STR + DEX) * (2 / 100)) * 1.15 > ((Max Damage) + (4 * STR + DEX) * (3 / 100)) * 1.10
0.05*(Max Damage) + 2.30*(4 * STR + DEX) / 100 > 3.30*(4 * STR + DEX) /100
0.05*(Max Damage) > (4 * STR + DEX) /100
5 * (Max Damage) > (4 * STR + DEX)
5 * 1.20*(4 * STR + DEX) * (WA / 100) > (4 * STR + DEX)
5 * 1.20*(WA / 100) > 1
5 * 1.20 * WA > 100
6 * WA > 100
WA > 16.67

Therefore, Critical Ring will be better than Cruel Ring when you have at least 17 WA in total. Which is pretty much always.

Might have made a mistake somewhere. 17 seems a little too good to be true.

I think that you made a mistake. Shouldn't your second line be:
((Max Damage) * (2 / 100)) * 1.15 > ((Max Damage)* (3 / 100)) * 1.10 ?
Since this way we can calculate the needed difference in attack.
Then we go forth: (1.15 / 1.10 is 1.05, not 0.05)
1.05*(Max Damage) + 2.30*(4 * STR + DEX)/100 > 3.30*(4 * STR + DEX) /100
1.05*(Max Damage) > (4 * STR + DEX) /100
105*(Max Damage) > (4 * STR + DEX)
105 * 1.20*(4 * STR + DEX) * (WA / 100) > (4 * STR + DEX)
126*(4*STR + DEX) * ( WA /100) > (4 * STR + DEX)
126*(WA /100) > 1
126 WA > 100
WA > 1.26

Which is even weirder. :f6:
It's time for my cup of coffee, I'll recheck later.