Fighting styles are interesting and from what I’ve tested so far I believe in one thing: don’t reinvent the wheel. If your fighter is a pressure fighter, use pressure. If your fighter is a boxer use jab as a strategy. If your fighter is a brawler use KO (I guess?). I don’t use many brawlers. I’m also guessing counter fighters might like natural style.
BUT- and this is a big BUT, many of these styles can devour stamina (especially if you lose a round) or leave your chin open to breaking. So. Pay attention.
Chin stat should always be high. If not, protect your fighter with weak opponents until you can raise it through experience.
Body is a good strategy to use the first 1-4 rounds as necessary to build a lead in energy allowing you to deploy your main strategy after.
Matchups- pay attention to the fighting style matchups, especially in close fights.