Bip39 Browser Default variety of iterations Employed in wallets is 2048. Growing this variety really should make it more secure from brute drive attacks, even so you will have to retailer this price. To obtain your wallet with tailor made PBKDF2 you ought to use this script (or very similar) https://travialist.com/story8710265/bip39-words-github-the-fact-about-bip39-phrase-that-no-one-is-suggesting