Based on what they did with this OCP (Anemos in Rare), I get a feeling that the Shield Ring is also going to end up in Rare when they drop it next month. Getting two of them for a build like this might end up being an expensive option, even if only RGs can use them properly. I'll probably try and get my hands on one, but I'm not holding my breath thinking that getting two is going to happen...
I'm basing this all on what happened with the price for the Phoenix Circlet. It never really came down, even if the headgear wasn't all that useful in the big picture.
On the plus side, at least the price for Anemos seems to be coming down finally. If it hits 300M, I may finally buckle and get one to complete my set of four shields.