Tweetburpee box jumps to pullups, kettle bell swings to push ups. tire flipping and hitting with a sledge,
for cardio one of the best to blow the lungs is an all out one minute round on the bag with no stopping all straight punches then immediately run 250 meters at a fast pace. 30 second rest and do it again. this is a cardio crusher. want to add use the 30 second rest for lunges so rest from cardio but not work.
i like doing stuff like floor press with 50% of my max weight explosive up then putting the bar on a higher peg and do body rows. back and forth. set a time limit, say 6 minutes to start. don't stop. you will find you will have very sore pecs and lats and will be blowing wind like a hurricane. it's great when you can get a strength workout with real cardio at the same time.
a lot of BB and power lifters bag crossfit but other than the arthritis in my back i am the strongest and in the best shape of my life. i do not have the same level of pure strength as when i power lifted but i can maintain 85% max reps for much longer than i could maintain 65% max reps when i power lifted.
my CF coach calls it power to efficiency rating. if it costs your body less energy and O2 per rep this means your machine can work longer and harder increasing gains for BB or power lifting and making your heart happy with all the cardio.
we have a guy who is pretty big 185# at 6' but you would not call him jacked. he has an athletic build. he popped off 10 415# reps for 3 rounds of a metcon. this included running 400 meters and deadlifts. i used 135# for my bench and still could not keep up with him.
anyway. check out some crossfit workouts on line and incorporate some of their stuff.
my goal is no longer mass and pure strength. i started crossfit to help my in combat sports. it did. hell we know shocking the body with a different style workout is good. also i love the competition. in BB it might be about your big lift or having bigger legs but that is subjective. the stopwatch does not lie. neither do the fists in the ring or on the mat