If you have visible signs of gyno, I'd start with .5mg/eod for about a week and adjust as needed based on results.
As Megatron stated, you really need bloodwork to see where your E2 levels stand. Many people judge their E2 levels based on visible side effects, but just because you don't show any visible signs of elevated E2, doesn't necessarily mean your E2 levels aren't elevated. Bloodwork is the only way to truly tune your doses to best benefit your body.