The Gimli Glider had one thing going for it - with respect to sidegliding - and that was no engines running.
Jet engines are rather sensitive to the way the intake airflow hit the fan.To willfully introduce a "skewed" intake airflow carries high risk of resulting in a flame-out or surges (backfires). Most manufacturers require that ignition to be on just for flying thru moderate turbulence !
Meanwhile, you've initiated a high rate of descent, dropping like a brick, and now you want to stop the descent. One, maybe two engines inoperative ... you see the problem ?
The way we ovecome your initial problem is the stabelized approach technique. Try the Prune search function (when it comes online again).