I would appreciate your history like others will, we find strength and learn from each other.
Our history is similar in that until middle age I only had seasonal allergies, severe at times. Now like you I have ACD as well as GD and surprisingly my seasonal allergies are minimal, as if I have outgrown them. I hope your initial breakout period will be coming to an end, as I mentioned mine was for one full year.
I also am wonder if cilantro benefited me and others because we were not in our initial breakout period, but were dealing with our sequential breakout when we started using it. So if cilantro isn't helping you now and you go into remission for months and then GD does it's typical cyclical return you should try the cilantro again.
You also mentioned the time period of 6 months for chemicals and allergens to get out of our systems. I found that especially true with allergic fibers and chemicals, especially the rubber allergy. My foot pads burned for at least 6 months after all allergic contacts were eliminated. Partly because I I didn't think about the rubber residue on allergen free flooring based upon contamination from the soles of shoes and I would walk barefoot on these floors. I am extremely careful, yet if I find myself in a situation I wasn't prepared to protect myself from, for example a doctor's office with blended fiber chairs that contain MBT (my rubber allergy) and my chemical allergies to wrinkle free, scotch guard or fire retardant materials I find I can sit in these chairs without noticing itching. Befoer in 10 minutes I would start itching. I'm not saying these are not off gassing into me or not transferring though my skin, just that it's not immediately noticeable. I still avoid though. My last Patch Test showed a reaction but milder to MBT and to certain adhesives which are in the fabric protectors. My inflammation is down in my body and less reactive because of all my avoidances.