Game Mechanics: Damage disciplines not affecting non-standard attacks

[Treats]

This was what I had posted in the Backstab thread before Aaldill said the math was wrong:

Max hit = ((Offense + Strength) /100) * (Weap Damage * 4) * (2 + (Backstab skill * .02)

Min hit = (Weap Damage * 4) * (2 + (Backstab skill * .02)

From that source with a min hit of 416 (Backstab skill at 247 with 10% mod):

Min hit = (15 * 4) * (2 + (247.5 * .02) = 416.4

Assume strength at 200:

Max hit = ((250 + 200) / 100) * (15 * 4) * (2 + (247 * .02)) = 1873.8??