I think I will try the 1% round-up method next spring. If that fails to control the plantain but everything else looks good I may just spot spray with higher % RU, the plot is pretty small. If the 1% RU application wipes out the clover by chance, its not a huge deal and I will just begin working it for a fall re-seeding with multiple sprays and tills until its clean.
This is no longer my only plot so if it is empty for a few months it is no biggie.