I know it's an old thread, but just to give my perspective: I ran 600 test C 400 bold cyp. IMO EQ is way too long estered for anything other than a lower dose year round cycle with something like Test U (for ease of dialing in your doses). Because it takes so long to take a real effect on your system, you can easily start with way too high E2 and end with way too low E2 on a cycle. My E2 was around 20-25, no high RBC or hematocrit. I used Inositiol Hexaphosphate which made me go anemic but it kept RBC and HCT down lol. On top of that, donated red blood cells only at a blood drive. If you're not perma-cycling with bold I think there are plenty of ways to keep RBC and HCT down so long as you get regular blood work (and a basic blood panel is only like $8 so there's no reason not to do it at least once a month on cycle). Everyone aromatizes differently. Conventional advice is to run bold as high or higher than test, my advice to anyone trying it out would be to start at half your test dose. But again, everyone is different.