Nargott
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It still doesn't work out. There should definitely be 3 primary and 3 secondary skills. Making more than 6 skills for a class is clearly excessive (remember that each race has 3 classes, so together they can cover more than 8 standard skills for the race, but each of them individually is more specialized). 3 primary skills are easily recognizable as the "face" of the class (and the starting skills are also chosen from the primary skills). It is simply impossible to divide 3+3+6 in a normal way, because it equals 3*(1+1+2), and 100 is not divisible by 3.
However, there is an option to try 20*3+10*3+5*6 = 120, based on the fact that all classes have a starting 20% skill, so the total starting chance of getting a new skill is exactly 100 (120-20). This is still convenient, but there is a downside: the 5% skills are too easy to acquire (and the idea is that they should be acquired exclusively as a surprise, since these are non-core skills).
However, there is an option to try 20*3+10*3+5*6 = 120, based on the fact that all classes have a starting 20% skill, so the total starting chance of getting a new skill is exactly 100 (120-20). This is still convenient, but there is a downside: the 5% skills are too easy to acquire (and the idea is that they should be acquired exclusively as a surprise, since these are non-core skills).