I don't know what the hell HIIT is but it sounds gay as hell anytime I start to read anything about it. Anytime I see it discussed on this board or any other I just toss my puter' out of my 5th story window and God help the homeless nutcases in the alley that day.
Looking at the other stuff, it's not disimilar from my own training in what you are *doing* (I do tris. Ironman Florida this November Baby!) and will probably take up MMA in September.
The problem with your plan is that I don't see the goal. If you just enjoy doing that stuff, then you don't need a plan. You feel like getting out your jump roap and doing some double dutch with the girls on the corner, do it. You feel like biking, bike.
Odds are you will get enough cardio exercise to be, well, better off than if you didn't get any cardio exercise.