I use a 22 g to inject and it is virtually painless. I rarely bleed these days. 25 g is a little too thin considering how thick and viscous the solution is, at least I find it is, for me. I'm happy you found it so easy though, great!

To each their own.
I really don't personally see the point to measuring the levels at any time as they fluctuate (even if to a lesser extent on cypionate) and anyways, what sort of useful information could they provide? There is no optimal range based on evidence based data, it was arbitrarily chosen. Some do indeed do fine within that range, some can even have great results with lower levels while some feel best on higher levels. Studies have also have shown that when bio-identical estradiol is taken parenterally (non-orally), even high levels appear to be
quite safe, whether it be men, women, of all ages, up to 91 yrs old. Consider that pregnant women have levels that range from as low as 800 pg/ml to up to 75,000 pg/ml. During a typical menstrual cycle, levels can also go as high as 650 pg/ml.
In only two days, my levels dropped from 2,500 pg/ml to 1,300 pg/ml. I'm on estradiol valerate though where levels fluctuate much more than cypionate.
I will usually engage in conversations like this with my doctors to better understand why they do what they do, ask questions, be curious, challenge assertions. Sometimes, they still insist on doing what they're doing, regardless if it makes sense or not or if not justified because they are following orders and protecting themselves. I can understand this but there are doctors out there that are also open to change if provided good arguments and solid data. They are interested in learning more about the matter, doing what makes the most sense and giving the best treatment possible to their patients.
My 2 cents. I'm not an expert but I think it's important to express such opinions. I hope it all turns out well for you.