Biopsies (upper, mid, and lower) for EoE *should* be done during EGDs as a matter of course, and most experienced GIs will do so if reflux is suspected. As bowecho mentioned in your other thread, EoE is most frequently a response to a food allergy, although it can also be a response to reflux. I've had eosinophil counts up to 14 per HPF, and up until recently treating it with a swallowed corticosteroid inhaler. I stopped this treatment because long-term (over a year), I've been developing some side-effects.
During one EGD, the rings were observed, yet another EGD showed the same eosinophil counts yet no rings. The symptoms can mimic heartburn, as well as a general feeling of malaise and lack of appetite. I no longer feel these symptoms, even after stopping the inhaler.
No reflux surgery can be done while EoE is present, which is one reason why I was aggressively treating it last year prior to my TIF.
Eosinophil counts higher than 20 per HPF usually are indicative of a more chronic condition, while those related to GERD are less.
Just a suggestion, but you may find it more helpful to keep your comments related to an OP confined to one thread. That way, others who respond can see the thread history and see which of your questions have already been answered, what the situation is, etc. Also, it keeps the messageboard from getting loaded up with redundant threads, and other posts getting knocked to page 2.
Hope this helps.