D. kingianum should do really well in SF unless you live in one of the really cold and foggy regions on the west side of the peninsula, or Pacifica.
I think the worst damage to your plant was caused by spider mites. These are most active during warm, dry weather. They are well-established in gardens in many urban areas and always a threat. It is likely there are still some on your plant.
D. kingianum should start growing soon. Keep it mostly dry until it begins growing. I would divide and repot when the new growths emerge and begin growing roots. When you chop it up, try to keep pieces with at least 3-4 green pseudobulbs.
I would chop it up and divide on a warm, sunny day if possible. Personally, after chopping it up and throwing away the dead parts, I would completely submerge the good pieces in soapy water, 1 tablespoon of dish soap per gallon of water / 30ml soap per 4 liters. I would swish the plant and let it soak for 2-3 hours. This will kill all the spider mites and mealy bugs on the plant, and their eggs as well. Then I would repot.
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