How do I make an entity be avoided by a skeleton?

So I created custom armor, but I want it so when armor is worn, that skeletons will avoid the entity or ignore it. Ideally for any entity that wears armor, but player is good enough for me.

Or just that specifically arrow damage is negated. Also so that the effect only happens when entire set is worn

Please, anything that is even remotely similar is good enough, please without code because me dumb