The best you could do IMO is to just get thru The Destroyer as fast as you can. Don't worry about mistakes here in there. If you get stuck on 1 problem for a while, mark it, skip it and move on. Review the solutions and GRASP THE CONCEPTS.
For OC/GC, if you're short on time, really undestand Chad's vids for OC/GC.
For bio, just do 50-60 questions a day, even more if you want. Mark your answer and move on quick. Then, check the solutions to memorize the answers. You can also hop on Cliff's AP or whatever good source of bio you have your hands on.
You have to understand, The Destroyer will destroy your confidence COMPLETELY. People have regurgitated that it is simply overkill. I guess (and don't quote me) the way it is, is that you establish a good foundation first, then practice practice practice using Destroyer. Destroyer is basically just OVER-prepping you for the actual DAT by exposing you to deep-thought application of concepts for almost every question. That way, when you get use to a 3-4 step mechanism and you see just a simple 1 stepper on the DAT, you'll be better committed to pulling the trigger on an answer.
If you're that worried about missing the cycle and you're short on time, just stick with Chad's vids and practice tests. Work more of the Destroyer whenever you can, but don't lose sleep over it.