I need to disagree with you to a point here dave. There is no such thing as cutting gear. Cutting is a term relative to diet. I can get just as peeled on deca or any kind of test as I can on any of the so called cutting compounds. it is all a matter of diet which will determine the outcome of your use. I am only in disagreement of the phrase cutting gear. Water retention is also a mater of diet and water intake, sodium and other electrolyte balance. Don't drink enough water and you will most likely begin to retain water, eat too much sodium and you will retain water. Kick your electrolytes out of balance and you will retain water, not from the gear from your bodies response to a perceived problem.
In answer to the op's question, dose does not change because you are going on a diet, your diet changes because you are going on a diet. Training does not change because you are dieting, calories and composition of those calories does.