I've tried resuscitating plants like that by withholding water and by watering, but haven't been very successful. The one with the longest roots I would definitely water. The others I would put in a warm, humid spot but not water yet. I could be wrong.
__________________ May the bridges I've burned light my way.
With these I unpotted them as none of the growths have roots that are growing anyway.
I ended up with many bulbs that were rootless and a bit shrivelled, but otherwise healthy. I'm going to soak them overnight to try and plump them up since they don't have roots. Then set them aside and see what happens.
The bulbs with new growth but not roots are sitting in water to try and plump them up and maybe the new growth will push new roots.