Try getting some actual running for your cardio if MMA includes running and sprinting for cardio then I guess it's pretty good. I'm not sure how well rounded your gym is, since some gyms focus more on stand up or ground game than others, you should try to work in on whatever is not focused on your own time. Like when I went to this one gym called Underground Submissions we did a lot of jiu jitsu and stand up but not that much wrestling so I did some Greco with this one club offered at my school, on my own time. But yeah, try getting some cardio. It's very important, you have to make sure you don't tire out or that you have the cardio to push your opponents more.