I'm 6'1 with about a 74" wingspan. Front headlock chokes are a solid 1/3 of my game. In my experience, guillotine and D'arce chokes CAN present themselves in scrambles. Guillotine chokes are much easier to finish because of how simple the set up is. D'arce chokes are tricky. If you have it locked then you can finish it from top, bottom, guard, etc. Whatever you can get atm. The issue I have is finding the sweet spot with the lock. Some circumstances call for shallow D'arces. Others you just can't finish on bottom (depending on positioning and type of guard). Getting a good lock on the choke mid scramble or TD is hard. I usually have to adjust at least once. And every time you adjust you open chances to escape. With that said, I'm no Tony. That man is worlds ahead of me in the D'arce game. But yeah you make solid points. The thing I was disputing was the likelihood of setting up Peruvian necktie and anaconda chokes, which requires you to be on top in turtle with a full sprawl.