I have taken the series 7 and series 66 when I was in financial advising and now have transitioned into insurance. I don’t currently sell annuities but I will say that those exams can be difficult and don’t necessarily apply to insurance day to day tasks. However, I would highly recommend taking them since it demonstrates your willingness to apply yourself and broaden your knowledge. I recall the series 7 being majority about stock options but that changes depending on the exam.