jiansonz said:
I tried out the build on an online skill planner, assuming +4 lightning skills.
If I want Lightning as my secondary skill (she´s still Blaze sorcie, first and foremost!), I should max that and then go for level 15 CL and level 12 LM in the end. For some reason, this leads to the highest Lightning damage. 14 CL and 13 LM would be the same. Other combinations gives slightly less damage.
Best order would be to pump Lightning first, get a point in Mastery at level 30, then max Lightning, then pump the other two skills at even speed.
If you wanted some math behind the numbers, here it is. Mastery and synergy bonuses are multiplicative with each other and with skill damage.
c = hard pts in CL
l = hard pts in LM
c+l = 27, l = 27-c
L = total pts in LM
L = l+4, hard points plus +skills
x = total modifier
s = synergy modifier
m = mastery modifier
x = s*m, synergy and mastery bonuses are multiplicative
s = 1+.08(c+1), CL gives 8% damage per hard point, and you have a prereq point in CB
m = 1+.5+.12*(L-1), equation for LM damage/level
therefore
x = [1+.08(c+1)]*[1.5+.12*(L-1)] substituting s,m into damage formula
= [1+.08(c+1)]*[1.5+.12*(l+3)] substituting for L
= [1+.08(c+1)]*[1.5+.12*(27-c+3)] substituting for l, l = 28-c
= [1+.08(c+1)]*[1.5+.12*(30-c)] combining terms
= -.0096c^2+.2784+5.508 combining terms
differentiating x with respect to c (yay high school calculus!)
dx/dc = -.0192c+.2784
set dx/dc = 0 to find the maximum
0 = -.0192c+.2784
c = 29/2 = 14.5 = 14 or 15
l = 13 or 12
L = 17 or 16
So you should put either 14 or 15 into CL, depending on which way you round. That leaves either 13 or 12 hard points left for LM. This is consistent with your skill calculator damage.
I'm exhausted right now, having been up about 24 hours straight. I'll pound out an equation for marginal gain from CL/LM sometime later today/tomorrow.