Hi Deb:
Just want to share with you my recent experiences. I don't think they are successful but I feel reduing daytime sleep and earlier bedtime helps my lo to erase some OT and to sleep more than 10hrs at night, but a little helpful with EW.
My lo's original routine is quite similar with yours. He sleeps only 10hrs at night and his daytime sleep is about 2hr20min-2hr50min. I followed Layla's suggestion to put his am nap off until 10:00 and limit it for only 45-50min, then offer him his pm nap 3hr10min-20mins later. As you know, his pm nap usually ends up 45mins again. I can't help but move his bedtime earlier. Because his daytime sleep reduces so much (from 2hr40min to 1hr30-50min), his night sleep hence increases from 10hrs to 11hrs/11hrs20min/11hrs40min. The theory of robbing Peter (daytime sleep) to pay Paul (night time sleep) works on my lo. Although his daytime naps are not good, his prlonged night sleep helps him erase some OT. When he wakes up, he is better rested. My routine is still "floating" now and I know 12hr45min-13hr is the maximum sleep for my lo. Interestingly, he will do the math himself. If his daytime sleep is less, his night time sleep is more. That's it.
I find that if my lo's daytime sleep is equal to or more than 2.5hrs, his night time sleep won't be more than 10hrs at night and his NW is longer. So I suggest that you may gradually reduce lilian's daytime sleep to around 2hrs and then see if it helps. When her night sleep is prolonged, she won't sleep so much during the daytime naturally. I also find that he will cut his am nap to 35-40min himself when his night sleep is good. But my lo's naps are not in good shapes yet. He had a 35-40min am nap and a 1hr-1hr10min pm nap today. So his bedtime is earlier again. (7pm)
Or you may want to try later bedtime. You can put off your lo's original bedtime 15mins for a week to see if it will help her to wake later. My friend told me it will take 1 month to move lo's bedtime till 1hr later. All the cycle will be shifted, too. HTH