Thorns golem?

So I switched from pure golemancer, to thorn summoner. Heavy focus on "golem inherits X% of thorns" and using bone golem for the taunt. One thing I don't understand, the build I used for a baseline to help me start uses probably like 20k+ armor.... when it caps at 92xx.... is there a function where thorns is increased X amount in tandem with armor even if overcapped??