If you would put a number to "moderate weight" and "really high reps", what would those numbers look like?
Just from my experience with little wrestling I found there is two different strengths. What I mean by that is there is wrestling strong and gym strong. Many people I've done BJJ with feel a hell of a lot stronger than me at wrestling but they would have a hard time (I would imagine) keeping up with me in the gym with bench, deads, and squats etc.
Have you ever thought about just taking up more wrestling in the off season? Like wrestle with someone in a higher weight class for fun. (I know there is a off season for a reason etc) Why not pick up different styles along the way?
I also believe the use of body weight exercises will help build those stabilizer muscles and increase strength to be used more effectively in wrestling. Why I suggested wrestling in off season as well. Not saying that my previous advice does not have a place asit does in aiding in strength and size gains.
Probably gave you more information than you were asking for. But something to think about.