Thomas,
You said,
"...dubious..."
--> I can point out dubiousness in the Bible. (I already have.) I do not see a value in seeing who has more dubiousness, but your choice of vocabulary seems to have you heading in that direction.
"...masters..."
--> The Masters who started Theosophy? I am thrilled you have opened up this topic. What do you know of the Theosophical Masters?
"...ascended masters..."
--> It is important to distinguish the Theosophical Masters from the "ascended masters" of the "I AM" movement which came into popularity in the early 20th century. I have never seen the Theosophical Masters referred to as ascended masters (within Theosophical literature).
"
... doctrine of ... masters ... requires a perhaps greater leap of faith than any of the 'institutionalised religions."'
--> Not at all. When I read Christian theology, I find "dubious leaps of faith". I have yet to find a flaw in Blavatsky's philosophy. What flaws have you found?
"...Olcott's subsequent promotion of the highly dubious doctrine...."
--> I am always a bit puzzled by the church's unhappiness with Col. Olcott, but I guess it cannot be helped. Perhaps a little history will help everyone understand why church leaders just do not like Theosophy.
Around the year 1900, Christian missionaries had almost completely wiped out Buddhism in Sri Lanka. Truly, they were within inches of their goal. In came Blavatasky and Olcott (mainly Olcott), and saved Sri Lankan Buddhism from annihilation. Today, Buddhism flourishes in Sri Lanka, and Col. Olcott is revered as a hero in Sri Lanka to this day.
Link to webpage —
Henry Steel Olcott and the Sinhalese Buddhist Revival (The description of Col. Olcott in that webpage as an "American-born Buddhist hero" rings very true.)
(Many people do not also know that Col. Olcott designed the very Buddhist flag that all Buddists use today.) Blavatsy and Olcott also became famous as the first white Buddhists ever, but that is another story for another day.
The Christian missionaries were incensed — years of work had been destroyed (in the eyes of the missionaries.) The battle was on, and church leaders carry on their anti-Theosophical campaign to this day.
Continuing on with your comments, you said,
"...the study of sacred texts and doctrines..."
--> Theosophical scripture and doctrine is just as sacred as Christian scripture, if not more.
"...the AngloAmerican school of empirical analysis ... favours too heavily the diachronic..."
--> It is not a matter of the quality of analysis. It is a matter of pointing out mistakes and misinterpretations which have been perpetuated over the centuries.