What is the best way to train for "combatives"?

What kind of fitness plan would help me get stronger, but more overall sense…..

I’m wanting to train up for combatives 2 which is going to be in Dec or Jan. I realized though when I’ve been hitting the gym I don’t have a particular plan in mind.

I lift some weights, core exercises, cycle, run short or long distance depends on day. Then end with punching bag or speed bag. I figure maybe finding someone to roll or spar with would help, but don’t know anyone personally who would want to…..

I’m not in amazing shape, or out of shape I think somewhere in the middle… I guess.

Any ideas or advice?