Here are a couple of nifty things that many young guys don't practice...or should I say are not taught anymore but was something many old time fighters mastered....Though not on your list might be useful...Of course they take some practice in sparring first so...

Punching Gloves--

Very effective against a slower guy who likes to power punch a lot. or you know is just stronger then you in general........Instead of worrying about your jab landing in his face to keep him off balance and taking a chance at getting caught with a big shot. Punch his gloves every so often. Of course not during a flurry or during your offensive attack but as you are circling and you see he is looking to land.

The punch does not need to be hard just enough to land and push his hand a bit. Is most effective when circling. The idea is to throw off his rythm and make him set again. even if you catch his glove just as he is about to throw a shot it will effect the intended traget and take off a bit of steam. It works in the same fashion as throwing jabs at a shoulder to force a guy to reset himself but the advantage is you are able to be further away since his hands are in front of him you get an extra 4 or so inches of distance to keep you safe. It is not something you use time and again but every so often. No serious damage is done of course but gives you time to get off right after before he is set. Also after a couple of times it will make the guy aware of it and help throw off his game by giving him something new to worry about