Sabala, 2 things I'd change in your routine. Don't stretch in between sets unless it's dynamic stretching, and stop doing so many reps. If I wish to max out at let's say 315, I'll do 5 reps with 135, 4 at 225, 2 at 275, and a single at 315. You're wasting too much energy by doing all those reps.
If I get you in a rear choke, you'll either tap out or pass out.