Hi, I'm not Cathe (though I wish I had her body, hehe) but I think one of Cathe's highest intensity cardios besides those that you have mentioned is Maximum Intensity Cardio. Another would be Circuit Max, even though it is a cardio/weight circuit, the weight sections move fast enough that it's more of a cardio workout in my opinion. Circuit Max is the only Cathe cardio that has made me nausous, lol.
Step Blast is intense too and very fun, but a notch below the above mentioned as far as intensity goes.