Bip39 Derivation Path Default variety of iterations Employed in wallets is 2048. Growing this selection must allow it to be safer against brute force assaults, however you'll need to store this benefit. To obtain your wallet with custom PBKDF2 you must use this script (or comparable) to determine your BIP39 https://nimmansocial.com/story8505256/bip39-length-how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39