1. Write down my 24 word seed phrase sorted alphabetically and give it to my partner or anyone else
2. Put the numerical index of the order of this into a deadman switch which will be sent to them if I fail to respond for my chosen period / times.
This is definitely one way to setup your inheritance plan and as long as your partner knows what to do with the seed phrase your crypto assets shouldn't be lost. I don't know how old you are or in which physical form. Hopefully there are no issues for you and you have a happy and long life, but this would mean you need to constantly respond to your Deadman switch. What if you are on vacation or forget about it? This could lead to some trouble if the index is sent early. Don't you have other forms of inheritance to give to your partner or kids? Another way would be to include it in your will and leave it sealed with the lawyers. Or do it like me and put everything in a deposit box at the bank where it is insured and your family has everything in one place. I think it all comes down to how large your crypto portfolio is, the more valuable the more money you should spend to make sure it falls into the right hands after your death.