The only ingredients in kings blood that will have any effect on E is DIM. and it will not
significantly lower E to any noticeable extent, unless perhaps you were taking DIM solo.
Nothing in FD2 or Bulbine will have an effect on E.
I would stack FD2 with Kings Blood, Testify or even Viron. No need for Bulbine too.
Especially if you haven't tried any of the other supplements in that stack.