Mist Mantle Evasion Rates

[pimpollo]

#of Stacks & Evasion%

1 0.050000000000000044
2 0.09750000000000003
3 0.1426250000000001
4 0.18549375000000012

5 0.22621906250000023
6 0.2649081093750002
7 0.3016627039062503
8 0.33657956871093775

9 0.3697505902753909
10 0.4012630607616213
11 0.43119990772354033
12 0.45963991233736334

13 0.4866579167204952
14 0.5123250208844705
15 0.536708769840247
16 0.5598733313482347

17 0.5818796647808229
18 0.6027856815417818
19 0.6226463974646927
20 0.6415140775914581

21 0.6594383737118852
22 0.676466455026291
23 0.6926431322749764
24 0.7080109756612276

[Elemensch]

So it's not stacking (x*5)% evasion, it's stacking x in 1-(0.95 ^ x) chance to hit.

The current formula probably does scale better than anything which could hit 100%.