I get your point when you say:
-- You have two people Acting in the same sentence.
How, then, do you describe simultaneous action, such as a glissade or scheilhau, without it sounding like a D&D fight, with everyone taking turns?
In animated and live-action film, simultaneous actions can be physically observed and comprehended.
In writing,
nothing happens simultaneously because the Reader sees and comprehends
one word at a time in the precise order they are written.
This is why word-choice and
the order they are written in is so very important.
So! How, do you describe simultaneous action?
-- You use terms such as: both dancers, all the dancers, six of the dancers...at the
beginning of the sentence. This introduces the entire group as One Unit -- One Object.
"The six ballet dancers jumped, a leg sweeping outward while the other leg brushed in to meet in a scheilhau. The dancers' legs and feet stretched and pointed for a brief moment before they landed in perfect unison.
In the case of a scheilhau, you have two long-swordsmen clashing, but one sidestepping to briefly slide up their opponent's blade to pierce their opponent's throat.
This you
do need to divide into two separate paragraphs by character because a scheilhau is a specific move done by one swordsman to another.
The two long-swordsmen clashed.
His blade in full contact with his opponent's, Harold sharply sidestepped to avoid the incoming sword, pushing the point away from his neck, then slid his blade up his opponent's blade. His point pierced the man's throat and went out the back of his neck.
His opponent's eyes widened in open shock and he choked. Blood spilled from his lips to run down his chin. He dropped his sword to the muddy ground.
Harold yanked his blade free in a spray of arterial scarlet.
His opponent dropped to the bloodied ground choking out the last of his life.
The key to making any fight scene work is to use only
One point of view per Action scene. Never ever switch POVs
during an action scene. All that will do is bog down the scene with heavy wordcount, and confuse the reader -- who is trying to picture it all in their imagination.
Never forget: One POV in a scene will always be easier to comprehend (and write) than multiple POVs -- because people only view the world from ONE POV their entire lives:
their own.
If you're interested, I go into
far more detail on
why you don't put two people in the same paragraph, plus how to fix it, with examples, here:
[Tutorial] The Secret to Proper Paragraphing and Dialogue