So I'm in class last night and I get paired up with this dude who was probably around 260 and tall I'm about 160 5"9 so we start rolling and I kept getting top position and keeping it but I had no way to finish. I got a guillotine from mount twice and couldn't finish it because his neck was so thick, I had his back twice and couldn't get the rear naked because his shoulders and neck were huge (he also had sick defence) so in this sort of situation what sort of thing do you guys suggest someone my size should work?