The reason you have higher E on bica is because some of the excess of T is converted to E via aromatase. But unless you actually supplement E, it won't have antigonadotropin effects, wherein the E prevents T from being made in the first place, meaning the E isn't keeping "it under the limit" per say. Bica on it's own, however, should be able to sufficiently block T from binding to the receptors. The only real worry with bica is if doing it as a monotherapy since the excess of T can get converted to DHT, which has a much higher affinity for the receptors than either T (about 3x) or bica (about 10x). But considering you are using finasteride, it should prevent the T from converting to DHT so you shouldn't have to worry.