Hi Kathleen
Just to add that the very high oestrogen levels recommended by the Studd regime were specifically to treat reproductive depression which he does define on his website (haven't looked recently!) which I see is still extant. This is very different from acheiving a level to treat more nebulous emotional symptoms - and to reach that magic spot that leads to general well being, above the minimum required to relieve flushes and sweats.
You may remember that years ago (more than 10!) on this forum we used to discuss just this - that the minimum dose required to eliminate the classic menopausal symptoms needed to be increased to give us a bit more of the zest for life and restore the "oopmh" to some extent - though recognising it's never going to be completely restored as in our fertile years.
For osteoporosis protection - I have yet to see a study determining the minimum level - though I did read one some years back which suggested around 165 pmol/l minimum though I haven't been able to find it. Current recommendations all seem to quote each other ie other gynaeocologists.
You asked opinions on 200 pmol/l. Most of the 17 years I've been on HRT I would say my levels have been max 200-220 and that would be at peak time between patch changes though when the patch was due to be replaced it was lower. As one example (admittedly not scientific!) I have not lost height at all even though I am now 71 - though I have never had a bone scan to check density, but at least I don't have osteoporosis. I would also add that I don't suffer from any negative emotional symptoms though surely these must also involve interplay with mental strategies towards life's issues and outlook - rather than completely relying on increasing oestrogen levels as a panacea. What I'm saying here is that even with levels of say up to 250 pmol/l you may still have the ups and downs you describe which I understand is distressing for you, but that oestrogen alone may not be the answer?
Once we are considerably post-menopause and on a stable dose of oestrogen, then I can't see that emotional ups and downs can be attributed to reproductive hormones as these will (should) be stable? If you were consistently lowish in mood then I would agree.
[ as an aside I am now on Lenzetto and levels have plummeted but I'll post about that on another thread!]
In your case, I would suggest increasing your oestrogen dose by say half a sachet, for a few months and see what happens. I'm not sure you would need to keep getting blood levels measured as they would surely increase to a reasonable level on this dose though would perhaps be instructive to see?
I'm also not sure of the value/long term effect of replacing oestrogen to a level of 300-400 pmol/l at our age and into our older age, though I know you're a bit younger than me lol! Or perhaps better to say a bit nervous of this without adequate studies. Personally if we are to take HRT until we die, which in many cases will hopefully be in our 90's then I would want to settle on a little above the minimum for bone protection - if this has been determined recently by studies, or at least, say 200 - 250 pmol/l.
I hope this is helpful and that you don't mind my giving an honest opinion to your question?
Wishing you well anyway!

Hurdity x