If you're HARDCORE & love a challenge, ignore this post.
For the rest of us:
There's actually not one, but *MANY* (Evasion) Buffs, that can *STACK*, & make a normal enemy into a *SUPER-BOSS* -- that's how I fought & had to flee from CockRoaches! (sp) [had a 92 EVASION!]
Others have had problems with them also.
If memory serves there's actually 3 (THREE). [3+@30 EACH= ~90+] They can be found HERE:
/assets/data/ File: Effects.gd
Be careful if you edit this to not change anything else.
For comparison: "Normal" hi Evasion: Goblins: 25
Given that they can *STACK*, I'd suggest 10 Ev each [MAX 30 stacked] ----but up to you.
[if a "normal" -0- Ev can have 90+, than a Boss or already hi Ev enemy can easily have 110+ !!! Maybe more. ]