@vitalik.eth
If you don't have a multisig or social recovery wallet, imo the next best is to split up your seedphrase with a "poor man's 2-of-3": chunk 1 is top + middle, chunk 2 is middle + bottom, chunk 3 is bottom + top.
We could even use the kind of paper that people use to sign two copies of a form at the same time for this: