I would start with just the var and see how it goes. 10mg ED is the normal dosage for females and I have seen it ran for as long as 16 weeks by knowledgeable females.
Example cycle i have seen a few females run:
W 1 10mg anavar ED (make sure you don't respond terribly to it)
W 2-10 20mg anavar ED
Most people recommend not going over 25mg but I have seen 50mg (I would not go over 25mg for a first cycle, instead increase duration if you like) be considered the max for females(by experienced females). Few notes are to run at least 8 weeks and go by how you feel/maybe get blood work done midway.
Crossfit is great for getting a girl into shape but if putting on muscle is the goal it may be worth it to run a hypertrophy based program for a while(especially if you have been doing the same thing for very long). I recommend the powerful women section; you have the drive, you just need to know which way to go.