For this setup to work correctly against physical attacks on your cryptocurrency holdings, all your backups need to be spread geographically, preferably across multiple jurisdictions with different laws regarding your rights to keep your personal information secret. One of them is obviously should be Wyoming. Yes, the first evil person to attack your bitcoin is going to be your own government trying to protect you from supposedly wrong investment decisions, which often results in citizens handing over their gold or something else valuable in exchange for questionable protection. Of course, people who work for the government know about all the established strategies of signature separation, but the xor strategy is somewhat modern, which means there is a tiny chance that they are not aware of how it works exactly. It is up to you to decide which approach to follow, but in my opinion, the best security approach does not involve sharing it on the Internet. Keep it secret how you keep your secret.