Hi and welcome to YT
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Why stop the Apoquel, when it was working, just bc of lethargy? That is a symptom with many meds that will go away over a little time. To me, these symptoms sound way to severe to not medicate, ya know? I'd get her back on the Apoquel ASAP and give it at least a month's time. Apoquel is *such* a great medication and can work miracles for so many allergy dogs.
The splotches you're seeing could be pyoderma, which is a staph imtermedius infection in dogs -- which needs a 'srcrip of Simplicef x 30 days to treat. If it's widespread like you're describing, topical things most likely won't do a thing.