An alternative ability system I have would be this one.

[Hider] We'll have SKILLS, TECHNIQUES, and STATS.

SKILLS refer to the things your character can do. Other examples would include medicine, carpentry, navigation, and marksmanship. These would provide us with a general idea on your character's field of expertise and of what there are capable of doing.

Now for TECHNIQUES. I’ll be giving out points that you can use to learn specific moves based on the skills that you have. If we take Zoro as an example, his skill would be Santoryu and a technique under this would be Oni Giri. Like you skills, techniques would also scale with your stats. The only techniques you would spend points on are combat-based ones. The only exception to this is when I require you to. Using Chopper as an example, his skill would be Medicine. To administer first aid and have knowledge on human anatomy wouldn’t require points. Just take your stats into consideration, look at your character, and ask yourself “Would he/she be able to do this?” I’ll trust your judgment, just don’t abuse it. If its creating some super-powered medicine, like the Rumble Balls, then that would definitely require a point; maybe several points but we’ll talk about that when we get there.

STATS are pretty simple so I’ll just list them down along with a brief description of each and a tier list. If you have any questions, feel free to ask.
[LIST][*]Strength is how much force your body can exert. A measure of your character’s physical force. Basically how much they can lift, carry, how much their blows hurt, etc.
[*]Agility is a measure of a character’s running speed and reflexes. It determines how easily one can dodge and how fast they can cover a distance. Heavily investing on agility alone does not transfer to incredible speed in combat. Performing intricate movements at high speeds becomes increasingly difficult the faster you move. A good example would be Kuro and his movement ability as he was unable to discern friend from foe. A refined version of this would be Rokushiki's Soru; to pull this off, a significant level of Perception is required as well.
[*]Perception dictates your character’s observational ability and accuracy. This determines how much detail they can make out and how good they are at managing to land a blow, whether that be their quirk, a weapon, or even a simple punch.
[*]Durability dictates how tough and resistant to damage your character is. This determines how much punishment a character can take and how much pain they can willingly ignore.
[*]Willpower refers to focus, concentration, defense against metal attacks, and how long you can last despite exhaustion. However, unlike the other four stats, Will cannot have points put directly into it. Instead it is a number equal to the average of your other four stats. This means your Will shall naturally increase as your other stats do.[/LIST][/Hider]