Bip39 Passphrase. Because of the cryptographic style of BIP-39, a weak passphrase would not reduce the protection of the other wallets or help reveal the seed words. What constitutes a "fantastic wallet" is one that has obvious, easy to access documentation on supported BIP requirements, derivation paths, and Restoration procedures. https://mixbookmark.com/story5212150/bip39-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic