Yaarel
🇮🇱 🇺🇦 He-Mage
Each of these features has specific mechanical considerations.Assuming we are talking about high level aka mythic fighters from legend and fiction, what are the core traits you associate with those figures that you want to emulate that simultaneously puts them on par with wizards ? Obviously strength of arms -- fighters should be the ones that fight the best. It's in the name. This should include, I take it, some limited use big guns (aka tear a giant's arm off). Next, they are almost always depicted as having superhuman strength and stamina -- not always superman levels, but certainly MCU Captain America levels. Maybe a feature where they get expertise in Athletics? Or they increase things life lifting capacity, jump distance, and movement speed? Finally you mentioned leader of men qualities. Do you mean having "summons" available in the form of soldiers, or warden like inspiration abilities or?
It is probably safe to say that most (all?) mythic warriors have magic items. Thor has his hammer, belt, chariot etcetera. Perseus has his sword, invisibility helmet, sandals of flying, and shield.