Bip-39 Default number of iterations Employed in wallets is 2048. Escalating this variety should allow it to be safer against brute force attacks, having said that you'll have to keep this benefit. To access your wallet with customized PBKDF2 you'll want to use this script (or similar) to work out https://socialbuzztoday.com/story4127908/bip39-regex-the-basic-principles-of-seed-phrase-generator