Definitely do some sort of cardio whether bulking or cutting. i stopped doing it altogether and i am feeling it now, Asthma is worse, I cant finish a set of Power Cleans without gasping for air that kind of thing.
Id do some Low Intensity stuff to burn fat either first thing in the AM (45-60 mins) or directly after weights (30-45mins). if you want to increase fitness then do some Interval type training on 1 or 2 of your non training days so that you still have at least one day of complete rest.
hope this helps