arimidex during this cycle

i am running 400mg/w of Cyp and 400mg/w of EQ. Ive done a lot of research and I feel as if i can get away with doing .5mg of Arimidex every other day (or even mon/wed/fri). Some people have told me that running .25mg of it mon-sat would work too. What do you guys think? I am doing the cycle for 12 weeks and i have been on now 2 weeks and havent started the arimidex yet at all.