We don't know the shield requirements yet. The info you posted is data mined, and therefore not official and could be subjected to change.
But we can speculate; I've kept my collection of exotics safe for over a year, until I recently got rid of all my Midas and Ca-useless. Figured I was never going to use them. Still could be worse, I still have the rest, but I'm thinking I won't need them for that specific shield, I can't imagine that one being final.
Luckily I found a Bliss Holster on an alt, because I thought I deleted them all.
1 people found this helpful