Insanely basic tips for writing fights:
So... You wanna throw some characters at other characters and tell them to kill each other, huh? Well, in order to make all that interesting, ya gotta consider these tips first.
1. I've been in martial arts for over six years and animation for just as long. So of course I'm going to suggest you plebs do a little research first. Wanna know how it feels to punch someone? Punch someone. Wanna know how it feels to get punched? Come over to my place.
Even learning simple stuff like rolls, stretches, differing exercises, and the most basic of techniques can help out a ton. At the very least, it'll keep people from making this face at you: ಠ_ಠ
You don't have to go all out like me, but at least learning the fundamentals of physics and how certain injuries will affect the fight can help. Take these fun little tip for example: there's a vein on the neck that, when hit properly, will make you instantly pass out. It only takes eight seconds to choke someone out to the point of fainting as long as you're holding them right..and if you keep it up, then just wait five minutes and they'll be dead. Anywhere in-between can give them serious head injuries they'll likely never recover from. There are a thousand more, but I'll stop there. Trust me. I've learned more about biology from karate than from actual Biology class.
2. I feel like this is also a given, but at the very least, know what your surroundings are. Find ways to implement the setting into the fight creatively.
Example: two people are fighting in the desert and one tosses sand into the other's eyes. Or, two people are fighting in that same desert, but the one currently losing is being shoved into the sand, choked alive by all the granules.
Also please remember that when your characters are in extreme heat or freezing settings, they will fight differently. Maybe it's even the setting itself that is slowly killing the fighters, and the battle is really all about who can last the longest.
At the very least, I'd suggest you do two things in case you have a hard time with this one. (1) gather images of the setting, or at least settings like it. Then, take note of all the elements, obstacles, and even ambiance involved. (2) pick out objects to scatter about the setting that your characters can later pick up and use in the fight. Just make sure they have to do with the setting.
3. The destination of the fight can greatly impact the "vibe."
In the sky: superman level fights, typically very grandiose, larger than life, and impressive (even if written realistically). These are great locations for if/when you're trying to make your character look cool in some way.
On top of buildings/canyons: similarly grand but with more emphasis on stakes. You typically want that sense of uneasiness every time the main character sways or is knocked a little too far away. These scenes are often used around a climax thanks to the perfect level of grandiose tension and realism. It's a great way to get your character on edge and reveal their true feelings, mainly fear.
On the ground, outside: these fights are often much more grounded than most. Often deals with a lot of running/trying out other options beyond fighting. Typically, you're trying to establish what kind of a fighter your character is in these fights + what their morals may be.
On the ground, inside: oddly enough, this is where it gets personal. Mostly because I usually think of someone's home or a grocery store where every action means something. This is typically where the most drama takes place. I'd definitely suggest you lean into the importance of the setting they are fighting in much more than the setting of other fights. (This is also where every word counts.)
Underground: by far one of my personal favorites. The claustrophobia one can draw from these settings is truly something else. The most grounded of any other fight setting. This is where I like to strip the flashy powers and magic from my characters and let them brawl the old fashioned way, getting dirty and going all out. Down here, every punch matters.
There are of course more, but these are the basics!
4. Similar to the first step, please know how the weapons your characters are using work!
5. And of course no fight is complete without (A) build up, (B) understandable reasons for the characters to fight, and (C) clear stakes/what would be lost or gained if either were to lose. Remember, a fight is just an argument acted out. Keeping that in mind will make the whole process so much easier.
Anyways, that's just about it. I could ramble some more, but these are supposed to be the basics!
Anyways, I hope to see you guys again. Thanks for your time. And, seeya!