If she's prescribing a single dose over 200mg and not watching your estradiol, then she does not know what she's doing, and you might get gyno. You should not need more than 200mg per week to get you to the top of the range. How frequently are these injections?
Once weekly should be the least frequent. That still could give you an aromatized E2 bump mid week, which is why many of us divide the doses and inject every 2 or 3 days.
You must get Estradiol checked. Ask her what she knows about Arimidex and it's function as an aromatase inhibitor. She can prescribe it for you for "off-label" use as an aromatase inhibitor.
With high doses of T, you likely will have a very high hematocrit, so the suggestion to donate blood every 8 weeks is a good one.