Dude, You need to be faster. Cardio in the pop fitness world usually consists of keeping up a pace over a long distance. This is generally terrible advice. Your capacity to move explosively is a key indicator of health and vitality. You need to be able to move yourself towards or away from a target, extremely quickly, especially under repeated emergency stress.
Jumping Jacks over Jump rope, thoughts?
Def not. If you are space constrained, just do Tabata as per above.