To the antipaladin guy,
Starting to read through your char, cool concept!
I don't think you are able to use evasion. Ring of evasion grants the evasion abiltiy, which only works in a certain condition:
Evasion wrote:
Evasion can be used only if the rogue is wearing light armor or no armor
You do not meet this condition as I assume the +14 armor bonus comes from Full Plate +5.
So I would assume you have the ability, but can't use it unless you remove your armor.
I see somewhat frequent errors in these characters (IE the Jimmy the Cleric build stacked a +2 wisdom Ioun stone with a headband, which doesn't stack) but yours happens to be the first time I've caught one within a short time of it actually being posted, so nothing personal!
Pretty sure the cyclops helm is designed to be used only within the Emerald Spire adventure, so of course it's gonna break encounters outside of that. But if the rules say allow it (I didn't see any equipment rules in the OP, for some reason) go for it I guess.