I would start the tudca when you are done with the dbol. I would consider using the Dbol for the first 6-8 wks. Then start the Tudca and run that all the ay through PCT. This is a fine cycle if you have already done previous cycles. Like if you started with a test/dbol cycle for your last one, this would be a good second cycle. Go for it and have a good run. Make sure you hammer the food to grow.
If you or anyone else needs help with nutrition and would like to hire a coach, keep me in mind. I am available over at the Next Level Nutrition section of the Naps site. I work directly with every client