Simple question but hard to find any info on!

How much TP do I get from the first hit of my Weaponskill when I am dual wielding?

A: Calculated TP as if I was single wielding that weapon
B: Calculated TP as if I averaged the delay of my two weapons
C: Same as B, but also reduced by current Dual Wield

I'm guessing its C but I couldnt find any info if thats correct.

Making the following spreadsheet as a tool, wanted to make sure my formulas are correct: