I think she needs an A time push Hun, and 2 naps....not 3...the third nap even though there to prevent OT is causing problems Keith her night sleep.
My first was a chronic EW. Yu have to push the am nap, and from a reasonable desired WU, not actual WU. So reasonable here would be 6am, anything earlier is nighttime and treat it as such, even if your in there cuddling or feeding...walk out at 6, then back in 'good morning' open curtains/lights etc. start A from 6, no earlier and do at least 3hrs15 to start.
If you get a good nap, or anything over 1 hr (even 45 mins if she man cope) then do another full A time. I would do 3hrs15-30 first with intention of 3.5 hrs in a weeks time. Even with a short nap, don't give another nap, try EBT, your more likely to get a long night this way than with another nap and later BT.
Sorry I know this sounds long winded, EW stink, but you really have to push them a touch to get out of it at this age I think.