[mygoditsraining]

I always liked the Terminator versus Terminator fight scenes, to refer back to Sloweye's comment - especially the dispassionate glare both robots lapse into as they pound each other about relentlessly trying to cause enough damage to shut the other down. Sadly they don't have nearly enough of that in the tv series but I guess there's a budgetary constraint. That said, I could watch Summer Glau throw herself around all day and never tire of it.

But I digress.

I think trying to focus on action and feelings and wholesale destruction and struggling with inner demons and all of that for both characters would be a nightmare - my suggestion is to write a pure action scene, then rewrite it as a pure inner voice scene and pick the better one; then you can use the other to insert lines that give the flavour of the "missing" portions but don't slow the whole thing down to an absolute crawl.