Injectables worked better for me. Thromboembolic risks as they relate to liver production of clotting proteins/enzymes appear to be quite low on injectables but bio-identical estradiol taken orally also appears to confer less risks than say birth control pills or Premarin given to post-menopausal women.
Nicotine still negatively interacts with estrogen taken orally by reducing concentration of estradiol in the blood. In one study of which I have the full article, the levels of estradiol, when taken orally were 5 x lower in women who smoked 10-20 cigarettes daily vs non-smokers. Non-orally (patch), levels were similar, it didn't make a difference.