If you are using the V2 scheduler then the limit on the child decks is not being honored anyway. So you should just set the top deck to the total cards you wish to do that day, and all subdecks to a high limit like 1000.
If you are using the V2 scheduler then the limit on the child decks is not being honored anyway. So you should just set the top deck to the total cards you wish to do that day, and all subdecks to a high limit like 1000.