Hey I wrote a long winded response but I accidently deleted it. I will give you an abridged version that hopefully captures the essence:
To get info on hybrids try the search function under the surgical outcomes forum and then PM some people whose stories resonate. They will be the ones to give the best advice if you are going that route.
Note that ADR doctors in the US will ALWAYS recommend a hybrid fusion for multilevel because that is all insurance companies will pay for because that is all the FDA studies really studied for. :/
If you have the $$ and then time you may want to investigate other options outside of the country, e.g. I got a 3 level ADR no fusion in Spain last week.
FYI I did investigate the US as an option and was given a hybrid as a solution but it just wasn't for me - your mileage may vary.
Send your films to some overseas doctors to get their opinion it is usually free for a review and they may have another opinion.
Just some food for thought.