Bip39 To Bip32 Default variety of iterations used in wallets is 2048. Raising this selection should make it more secure versus brute pressure attacks, on the other hand you'll need to shop this benefit. To obtain your wallet with custom made PBKDF2 you'll want to use this script (or related) https://bouchesocial.com/story20560513/bip39-to-bip32-bip39-an-overview