Would you advise me to create the three seeds through the electrum software or through
https://iancoleman.io/bip39/ (BIP39) ?
What would you be the pros and cons of each method?
Thanks!
As I agree on posted above,
But, you have to try it and research what you want to know. >
https://iancoleman.io/shamir39/ (this is the Prototype version, just used for experiments, so dwyor)
Besides electrum (electrum seed), Maybe Trezor HW you can use as an alternative to generate (BIP39 seed)
triple seed aka Shamir secret sharing where you can import it on electrum wallet using Slip39 seed option.