If you at at any time take his back and can't find the choke, use his lapels and frustrate him by grinding them against him digging the knuckles, eventually he'll make his move usually to explode out of the hold. Keep it tight to his neck and if he attacks the lapel grip the RNC is there all day. You will most likely have superior flexibility than most of the competitors and if at any time you can scissor a leg behind his neck for leverage it's usually takes a few seconds and nighty night, also leads into some pretty vicious set up for armbars. Logan pretty much nailed it when he said the Ezekiel choke are able to be set up from almost any position. These were set ups I used a lot in Judo. Basic, but I hope it helped.