I'm not an expert but I sprayed FA last week with Cutrine Plus, a store brand surfactant and a little bit of Diquat mixed in. It was all dead by the next morning. I think the Diquat was the determining factor in the quick kill.
Used Reward to kill DW. I am just starting to get grass back where it was wind blown. It's more than likely instrumental in your success but I'm not sure I want to subject the marginal Plants along my ponk banks to it just yet. But I'll keep it in mind for a plan B.
