in addition to above anon's advice, don't be afraid to compress fights. meaning, don't feel the need to write out every single punch or every single swing of a sword - if it's agreed that your opponent is likely to block and/or counter most of them before one lands, gloss over a few. like "a sequence of hits" or something. sticking to each individual hit one per tag drags fight scenes on over-long and is usually why people get bored with them.

really, unless you're fighting to show off every move, like in a first-time spar with a new opponent, or you need to drag it out because both fighters are OP and it would go on forever with gradual escalation, you can abbreviate the fight. so long as you accomplish your intention (my character gets a broken rib, yours gets a cut on the arm, mine loses the trinket he was protecting), the actual blow-by-blow can highlight the important moments and maybe one or two instances of badassery on both fighters' sides but doesn't have to be every single damn punch.