YK I think I agree with Lauren. Once on one nap some kids just won't go back (ahem my boys *grumble*) and I think your LO may be one of them. The two naps could be messing her up more.
Given the cu hasn't worked, and the EW are pretty chronic no matter what would you consider a week of trying one nap with a set nap time? If so I would do this
WU 5.30 (anything before this is NW and she stays in bed in he dark, or in your arms if fussing)
Nap 11-2 (let her sleep as long as she will. If she wakes early you APOP. She stays in the dark in her cot or in your arms till a min of 12.30 to let her know it is nap time.even if your cuddling/rocking.
BT no earlier than 6 or later than 7 but if the nap is terrible ie 30 mins and no resettling try a car trip around 4pm for 20 mins and BT of 6.30)
Katherine - interesting to know what you think here Hun - but know you may be a bit busy with NB snuggles