Launches every other week creates a demanding build schedule and I have found that I need to assign some priorities. Where you have been flying SD, PD and Altitude I would encourage you to keep flying those and work on getting 2 flights in on each, perhaps one with an existing rocket and one with a newer updated model.
Take a look at the NAR contest pages for some non-kit based competition rockets. Most are pretty straightforward builds. If you would like I can share my approach to contest building at the next CMASS meeting.