Quote:
Originally Posted by PK
Ivalero is right. Consider the following, where
F = Form skill
T = Technique skill
X = The result of a single 3d6 roll
Y = The result of a different 3d6 roll
Z = The result of rolling 6d6
and understand that
(X+Y) = Z, because rolling six dice together is no different than rolling three dice twice and summing it
Given the above, your system adds the margin from two rolls, so:
MOS = (F - X) + (T - Y)
MOS = F - X + T - Y
MOS = F + T - X - Y
MOS = (F + T) - (X + Y)
MOS = (F + T) - Z
See, Qhaysh, what you're missing is that you are rolling 6d6 for this spellcasting -- you're just doing it in two batches, but it's still effectively "one roll" because you're summing the margins.
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But you have two chances of failing with 2-dice rolls. With onlyone roll you only have one.