I'm in the same boat--vulval symptoms that I just can't seem to get on top of. I've used daily ovestin for years and twice weekly vagifem.
Nothing topical worked well enough for me until I started a systemic oestrogen (50mcg estradot). That improved things about 50%. But then symptoms came back (along with some other peri pleasures) so I added two small dots of testosterone (androfemme). My symptoms went away almost completely after 2 months on the testosterone. Unfortunately, that dose made me crazy (extreme panic attacks, depression, etc) so dropped it down to 1 dot about 6 weeks ago.
The vulval symptoms started to come back about 2 weeks after the testosterone drop. As it stands, I'm still 60% better than I was using the ovestin/vagifem/estradot/testosterone.
Then I started researching the makeup of vulval/vaginal tissue. There are a lot of androgen and estrogen receptors in the vulva (labia majora and minora), but less in the vagina. This could be why topical estrogen works well for vaginal and urinary issues, but often falls short on the vulva side. Most studies put vaginal symptoms (specifically painful sex) as the main endpoint with just a nod to vulval irritation. No surprise here given men design most of these trials.
So, given the androgen receptors in the vulva, that could explain why the higher testosterone dose worked for me. As I can't stay on that dose, I've just started a trial of Intrarosa as it is DHEA so metabolises to testosterone and estrogen. I don't use it vaginally, but melt it and apply to the labia and vaginal opening before bed. Only been trying this for 3 days so who knows if it will work. The oily nature of it is very soothing though, so I'm happy to persist. I'm still using Ovestin a bit in the morning.
Long story I know! But I've been fighting this battle for 5 years so will try anything!
Good luck and let us know how Intrarosa works for you.