1&2: I'd say do it like quiller does. Instead of creating endless links that interrupt the story, just write out how the fight scene goes without the links but change the color on specific words.
Ex: Ducking to avoid a punch that would have met with my face, I leaned back and put my hands on the ground to support my weight while I kicked both legs out, one of which had the heel connecting with his balls. And then he fell on me doubled over in pain. I think I heard my arm snap under the sudden impact of his weight. It hurt like hell.
3: "Duck!" you say.
"Nah, it looks more like an ostrich egg then a duck egg." he calls out over his shoulder, completely missing the fact that you were warning him. You wince as you see the rock slam into the side of his skull, knocking him unconscious.
