Oral only cycle is not good for your liver, adding Anavar to D-bol will stress your liver, make sure you get supps for your liver. As for the dosage of Oxandrolone (Anavar) depends on what kind of you're using. If it is original like BTG or SPA Ox then 20-25 mg/day should be fine. If it is something else then you should go up to 40mg/day to get the same effects.
BTW, please type without caps...