Hi again, Sancarlos.
After a quick reminder that I’m no expert, I think that the real answer to your question is: the game has changed (now that you are “on” ADT3), and so it (relating your “on” PSA test result to an “off” result) doesn’t really matter. Allow me to explain what I mean.
First of all, you have a challenging case. Gleason-9, six-of-six cores positive. No signs of metastasis to your bones (or elsewhere, but most commonly (70%) bones), which is great, but your doctor will undoubtedly watch this closely over the upcoming years while taking proactive steps (via ADT3) to keep it that way…but you are at higher risk than most typical PC patients of this happening somewhere down the road.
The goal of your triple-blockade is to cut-off the sources which feed prostate cancer, and to do so for as long possible because (as discussed earlier in this thread) the cancer will otherwise (most likely) eventually become hormone-resistant. Many men have been very successful on ADT3, and more specifically on the “intermittent” IADT3 for many years…especially those men who also embrace serious lifestyle modification in the areas of diet, exercise and stress reduction...other sources which also "feed" your prostate cancer. Dr. Charles “Snuffy” Myers is one of the leading experts in this area, if you wanted to research more.
So, you want to beat-down your PSA (which is the marker for disease progression). This chart (click on this IMAGE) is in Dr Stephen Strum’s publications (online, and I think also in his book), and shows visually the “Treatment Roadmap” of what you are trying to accomplish on ADT3. (a) Knock down the PSA by starting ADT3, (b) hold it down for a while on ADT3, (c) typically stop ADT3 and monitor how long the PSA stays down, (d) eventually watch it slowly rise, and then (e) when it crosses a threshold (5 ng/mL shown on the Strum chart, but more recently I’ve heard of 10 ng/mL) restart (“intermittent”) ADT3 again to repeat the cycle. Here’s a PCRI article from Strum; it’s from 2000, but still good. LINK
I’m going to politely disagree with zufus’ characterization of this being a “twilight zone” or “limbo land”…I think it typically follows a relatively predictable pattern (shown in the Strum chart), with some natural variation in the un-labeled x-axis (time).
My point here for you Sancarlos, which I hope is now more clear, is that it really doesn’t matter what your PSA might be without ADT3…what matters is if and when it rises after stopping ADT3 (the ADT3 "Treatment Roadmap").
I hope this helps. I undoubtedly covered some points in this topic which you were already familiar with, but did so in hopes that others less familiar with your type of case might also benefit & learn from reading this post in the future.