For starters, you have some great strength training workouts. As for cardio w/o's, the only one you have right now is KPC -- which is considered steady state cardio (unless you run, walk, or have a piece of cardio equipment at home). So here is a rotation I would do based on your requirements and the w/o's you currently own. Please keep in mind that you can take a rest day whenever you need it, and not necessarily on D4 and 7:
Sample 1
D1- PUB
D2- Cardio of choice*
D3- PLB
D4- REST
D5- Cardio of choice*
D6- Cardio OR PUB (premix) + Legs & Glutes (premix) or Butt's & Guts (premix). This will allow you to get a total body workout.
D7-REST
*Steady state cardio = KPC.
For a more varied cardio option, then I would recommend a hiit or metabolic workout. If you want to purchase Cathe workouts, she has many to chose from
. Here are a few just in case you are interested:
-Crossfire or To The Max
-Afterburn
-Cardio Super Sets
-Shock Cardio Hiit (3 tough hiit workouts. 30min each)
-If you know step aerobics, then Intensity or Imax 2/3 is a good addition
If you want to add more strength training w/o's, then there are tons of those too!
HTH! If you have any questions, just fire away
Natasha