Alright, we have decided to put in a stat system, which gives off a rough estimate of how skilled a character is in that area. Each area can have up to 5 points, which tells how good your character is in that area. Which makes the maximum total is 45, I'll use mine as an example.
NOTE: My character is Hokage, so she is a high level fighter, on level with Jiraiya, (Who is considered by Kisame Hoshigaki, to be out of his league and on a whole other level. Itachi Uchiha, says he could only possibly at his best get a draw. I love Jiraiya, RIP the Pervy Sage)
Stats: Tenshi
Ninjutsu: 5
Taijutsu: 4
Genjutsu: 4.5
Intelligence: 5
Strength: 3.5
Speed: 5
Stamina: 4.5
Hand Seals: 4
Total: 35.5
Now to explain the topics of stats, and once again I'll use my character as an example
Ninjutsu: How skilled in ninjutsu like Fireball jutsu or Rasengan.
My character is able to use the Sharingan, which gives her an edge in ninjutsu combat.
Taijutsu: How skilled in melee combat.
Because my character can use sword techniques along with her speed and Sharingan, she is fairly skilled in close combat, also some of her ninjutsu require her to get up close.
Genjutsu: How skilled in making illusions.
My character has the Sharingan, which inherited jutsu allow her to make genjutsu and reverse it's effects.
Intelligence: How smart the character is in battle.
My character is skilled in battle, able to set up an attack while attacking at the same time rather easily. Her tactics are top notch and rarely ever does she lose her composure. She is knowledgeable of jutsu and can formulate plans for enemies on the fly.
Strength: How physically strong a character is.
My character has rather normal physical strength level for people of her ranking.
Speed: How fast they are.
My character is as fast as Itachi, who was so fast that people with Sharingan can't keep up.
Stamina: How much energy they have.
As an Uchiha, my character has rather high chakra levels but they more tune towards the level of higher level chakra, more or less tailed beast level, due to her training this area specifically. Her stamina stat represents her physical energy rather then chakra.
Hand Seals: How skilled in creating the jutsu and using chakra control.
My character has top notch chakra control and capable of making hand signs at amazing speed. She is able to use the Rasengan which is chakra control to the highest difficulty.
Even as I say that, not all kage level characters have the same stats as my character. For Example
Naruto (Able to defeat Pain, who is able to defeat Jiraiya, Jiraiya's stats total to 35.5. Note: Jiraiya was beaten due to lack of knowledge, just had to throw that in)
Stats: Naruto
Ninjutsu: 4
Taijutsu: 3.5
Genjutsu: 2
Intelligence: 3
Strength: 3.5
Speed: 3.5
Stamina: 5
Hand Seals: 1.5
Total: 26
Sasuke (Able to fight several Kage level opponents and get away)
Stats: Sasuke
Ninjutsu: 5
Taijutsu: 3.5
Genjutsu: 4
Intelligence: 3.5
Strength: 3.5
Speed: 4.5
Stamina: 3.5
Hand Seals: 4
Total: 31.5
Gaara (Kage level character, former biju)
Stats: Gaara
Ninjutsu: 5
Taijutsu: 2
Genjutsu: 3.5
Intelligence: 4
Strength: 2.5
Speed: 3
Stamina: 5
Hand Seals: 4
Total: 29
The fact that these characters with these types of stats, they are able to be strong because what they excel at, they really excel at. Naruto has low stats but he uses his own style of fighting, which takes what he can do and makes it stronger.
Sasuke is able to use his Sharingan and Mangenkyo Sharingan to use his other jutsu to the fullest, which allows him to defeat several high level opponents.
Gaara may only be able to use his sand, but he masters it and trains it. With is he is able to defeat many opponents at once and if not for certain circumstances, defeat most who stand in his way.
The thing is, you have to make your own stats, and be honest, if your character is a genin they aren't going to have 5 strength or 5 intelligence. This is how your character is if not enhanced by things like Gates, Curse Seals or Senjutsu. Take the stats and put them as your character was thought up in your head. But be warned, if you think your character is going to be some extremely powerful dude, think again, admins will look at the character as you describe them, and then look at their stats and how they are portrayed in the RP, then approval and editing of stats can be made.