I think every rotation should have at least one or two pure strength training days. I know all those circuits have some strength training in them, but to me, they are just not as effective (they are fun though!). What I would probably do is replace Friday's High Step Challenge with a full body strength workout. On your second week, perhaps you could replace one of your other circuits with the High Step Challenge. Plus, you'll be less likely to get bored if you switch things around a bit.
Take Care,
Shelbygirl