Bip39 Tool. Thanks to the cryptographic style and design of BIP-39, a weak passphrase will not lessen the protection of the opposite wallets or help expose the seed words. What constitutes a "very good wallet" is one that has very clear, very easy to accessibility documentation on supported BIP benchmarks, https://moodjhomedia.com/story2644670/bip39-wallets-https-linktr-ee-bip39-bip39-words-an-overview