[@Ashifili]That stat system is the system from Fallout. It works great there since there's a hard level cap of 30 and perks which can take the Intensive Training perk which lets you put one more into your stats. Even then, you can only use IT 10 times and its generally a bad idea to do that.

Elder Tale on the other hand is an MMORPG with much higher level cap. MMORPGs don't use the 21 point system since it doesn't make sense for the game. Look at MMORPGs today, high level people have stats in the 90's or even more. The plain and simple truth is that either we use the letters or go in depth with numbers that isn't the 21 point system.

As for the other question, the Warrior would use Skills I think and it all goes back to their class. Guardians would use strength, Assassins would use Agility.