Yeah, it's not easy for me to get triangles, but I still act like I'm going for one. When They posture up to avoid it, I can sometimes sweep them instead. I would still practice/attempt it, just to keep people on their toes, and to attempt to loosen up your hip flexors. I used to do Toughman contests waaaay long ago, never really any mma stuff, so to speak. Honestly, as I said before, I'm not that good. Main reason I switched to kinda mma is because I have horrible footwork, terribly uncoordinated with my feet and legs, which isn't as big a problem when I'm on top mount, if I get it. I've got fast and heavy hands, but no solid footwork. I really noticed this when I used to play racquetball, so I learned to play the angles and play a short game. Boxing will build excellent footwork,endurance and get you less gun shy about getting nailed, plus it will teach you angles,counters and something that is lacking in a lot of mma, head movement and good jabs. When I say jabs, I mean an effective one, not one to just open hand paw at someone. I learned that the hard way when my hand was open and got cracked on it, jammed my fingers. Needless to say, I keep them closed now. I can still gauge my distance just fine, since I'm not slapping my sparring partner, I'm jabbing at him. I think one of the main reasons you see a lot of this is because some people aren't comfortable enough with their jab/boxing, and are worried of the takedown/counter. Trust me, a good jab will counter lots,and set up lots of moves. Kickboxing is also great, but the gyms I've gone to never teach head movement, and I'm not a great kicker, so I stuck with boxing. Wrestling is essential, and I know your big into Judo, but the 2 are different and very complimentary. I would say one of the best things that helped my throws and movement was Akido, as it taught me center line and I think it's called gravity line, and circular motion. Anyways, it taught me if you can control either the: head,hips or feet, you'll control anyone. Take for instance your on top control. If you control any one of those, how will your opponent be able to stand? The key is to finding out which one you are best at controlling, which also depends on what subs you intend to go for, if any. For me, I'm looking to strike, so controlling the hips is big for me, so they can't sweep me. One person who I sparred with comes to mind, and he was so good at control that you literally couldn't feel him on top of you. His strikes at the time were unimpressive, but his wrestling was top notch. He was able to transition at will and control me easily, but that was about it. It's funny, because I just watched the ufc fight of his and he subbed the guy with a move he first used when we were sparring. I didn't get caught in it, but he beat by just wearing me out. I honestly had no chance once it hit the ground, but I learned a ton, adn my technique got better. At the time, he had me by about 30lbs, but, if the roles where reversed, it wouldn't have mattered, he was so fundamently sound. This is something that I noticed about wrestlers, they hate/don't want to give up control, but you have pretty much have to when you go for some subs. Additionally, they hate to give up their base, which makes it hard for them to punch/kick with any kind of power, and can really make your arms tired if your just "arm punching." Sorry for the rambling, run on sentences, just trying to get it all out before I forget. There are others on here who can offer better advice than me, so I would seek them out. Almost forgot, those vids are GREAT!! I'm gonna start incorporating that into January's workout, an trickle some of that into the following workouts. I believe the move you are explaining is an arm bar, and it's effective. I try to stay away from joint holds until I know my group well, as it's so easy to get hurt. It's not so much the move, it's just being humble enough to tap, or not getting hurt trying to fight out of it. Stick with it bud!!
Right now I am looking into a local co-op farm here that grows a bunch of different fruits and veggies and you pay for the basket size and then can go in and fill it with whatever you want, which sounds way better IMO. 
