It sounds like you have it under control but I typically point people to Dave @ https://walletrecoveryservices.com/ for the less tech-savvy. He's pretty good. You can look at his site for what he can and can't crack. I know he's super super busy but it never hurts to give him a shout and ask him if he has any pro-tips or open-source code somewhere. A ping from someone who has a basic understanding of encryption might be refreshing.
Here are a random assortment of links I have saved regarding recovering presales:
When Ethereum was being developed, the spec for SHA-3 wasn't finished or something: https://ethereum.stackexchange.com/questions/550/which-crypt...
It sounds like you have it under control but I typically point people to Dave @ https://walletrecoveryservices.com/ for the less tech-savvy. He's pretty good. You can look at his site for what he can and can't crack. I know he's super super busy but it never hurts to give him a shout and ask him if he has any pro-tips or open-source code somewhere. A ping from someone who has a basic understanding of encryption might be refreshing.
Here are a random assortment of links I have saved regarding recovering presales:
https://www.reddit.com/r/ethereum/comments/46887p/tips_for_r...
https://forum.ethereum.org/discussion/3045/request-post-pass...
https://www.reddit.com/r/ethereum/comments/3g6aw0/i_lost_my_...