***WALL OF TEXT INBOUND. ETA 2 LINES DOWN***
Since you like to clinch, I suggest that you should try to work on the Russian 2 on 1.
It was one of my, scratch that, it was my most favorite grip/position when I wrestled.
Like somebody said before, the drop to the knee is used to change levels because you don't want to be bent over when shooting in. An example is the video below
When shooting in STAY UPRIGHT/ERECT, none of this stuff.
*the shot is around 2:40 in*
DO NOT BEND OVER LIKE THAT EVER especially if you're in the heavier divisions.
I learned that the hard way after I gassed, did a sloppy shot, and had 250 lbs of man smash down on top of me. I had some pretty hardcore mat burn on my forehead and right cheek afterwards which made the hot shower and the rest of the weeks practice, actually the rest of the week in general,
pure hell.
When you drop to your knee, this ones really hard for me to explain, don't just think of it as "I'm dropping down on my knee." as a lot of times people tend to just stop after they get on one knee because they focused so much on just dropping to the knee and, from the looks of it, I don't think it feels pleasant on the knees. Try to think of it more as an extra step you have to do in order to keep moving forward. IDk, that's how I think about it at least.
Also, my wrestling coach had us do drills where we had to shoot in and pick the other guy up with just our shoulders. That's how deep you want to be to where the only reason your hands are there is to keep them from squirming away once you two come back down to earth.
If they do sprawl on you "cut the corners" or any number of things.
Another good tip for shots is to clear the hands. Hand/grip fight with him and make him open up to where there's a nice clear path to his legs.
Also, remember, there are four lines of defense you have to overcome:
Head Hands Forearms Hips.
Speaking of head defense. Learn to use your head, literally. Use your head to push their head away from you by driving it in the space behind the jaw/under the ear. They can't shoot and expect to get anywhere near your legs if your head is in the way.
One of my favorite tactics in wrestling. From the collar tie, I used it a lot to push their face away so I could get my beloved Russian 2 on 1.
With sprawls you can't exactly be nice about it. He has your leg, you want it out.
Our wrestling coach told us that you want to smash their face into the mat with your hips when you do it.
***sorry if some, or a lot, of this doesn't make sense. I'm really horrible at explaining/instructing things.***
EDIT: I found a nice PDF file
http://library.crossfit.com/free/pdf/67_08_Speal_Wrestling.pdf