Andreas said this in a video a few years ago, but I disagree.

1) You can keep the output descriptor with each key. You are unlikely to use 2-of-3 of these copies.

2) You can combine multisig with Seed XOR(2-of-2). Ideally, each key would be in steel it requires each key to have part a or b of each other key. You should also have the extra word, but I am not sure it's necessary.

This is better from a privacy perspective because if one key is comprised, the thief has no way of knowing how much bitcoin you have.

Here is how it would work: