So I have both my and my brother's keys, would that help?
Assuming they were made on the same computer at relatively the same time, and assuming we were to use the more advanced recovery methods I've developed... In theory yes, in practice not really. It reduces the total number of possible keys from 2
60 (a darn huge number) down to anywhere from 189 million to 3 billion. (~2
27-2
32) That would take a loooong time to recover.
If you have a console.log from back then it would help more as well, but again it would still be in the hundreds of millions at the very least.
If you had 3 keydats, it would reduce the workload by a factor of about 1000.