Bip-39 Default range of iterations used in wallets is 2048. Expanding this number should really ensure it is safer from brute drive attacks, on the other hand you will need to retail store this value. To entry your wallet with custom PBKDF2 you must use this script (or comparable) to https://bookmark-nation.com/story18544676/bip39-phrase-rumored-buzz-on-bip39-phrase