I just noticed something weird, take a look at the pics from these two Skill Calculators:
The first one shows that i need only 421 297 SP, while the second one shows that i need a whole 908 769 SP
Now the first one is not up to date, since it does not have book 4 fire nuke, book 3 light nuke and book 3 ice nuke.
But still, the difference cannot be as big as 500k SP?
So is there some other SP calculator i can use or am i making an error in my calculations?