Shamir is a great tool for securing one seed. For loss prevention.
Or you can have three holders of 2/3 shamir shares. But to sign the transaction you need to collect at least two of them.. And once you have them you can sign whatever you want.. So is it question of trust between of 3 of you? → multisig. Otherwise shamir. But I guess that for will be better to use multisig.
You can still use shamir to secure your seed part of the multisig.You can even use so called super shamir for more complicated structures.
Shamiris a great tool for securing one seed. For loss prevention. Or you can have three holders of 2/3shamir shares. But to sign the transaction you need to collect at least two of them.. And once you have them you can sign whatever you want.. So is it question of trust between of 3 of you? → multisig. Otherwise shamir. But I guess that for will be better to usemultisig.shamirto secure your seed part of the multisig. You can even use so calledsuper shamirfor more complicated structures.