What you mean by DA can't proc when TA does? TA can proc on main hand and DA on 2nd hand for example for +3 total hits on dual wield/h2h WS.
.03*2 is chance for one TA where is the chance for 2nd?
You seems to write my option A but you added TA over DA priority ( 1-.03) but you forgot about second TA.
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